Commit | Line | Data |
---|---|---|
1ccea77e | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
d646960f SO |
2 | /* |
3 | * Copyright (C) 2011 Intel Corporation. All rights reserved. | |
966efbfb | 4 | * Copyright (C) 2014 Marvell International Ltd. |
d646960f SO |
5 | */ |
6 | ||
7 | #define pr_fmt(fmt) "llcp: %s: " fmt, __func__ | |
8 | ||
9 | #include <linux/init.h> | |
10 | #include <linux/kernel.h> | |
11 | #include <linux/list.h> | |
12 | #include <linux/nfc.h> | |
13 | ||
30cc4587 | 14 | #include "nfc.h" |
d646960f SO |
15 | #include "llcp.h" |
16 | ||
17 | static u8 llcp_magic[3] = {0x46, 0x66, 0x6d}; | |
18 | ||
0b51fc56 | 19 | static LIST_HEAD(llcp_devices); |
d646960f | 20 | |
098dafcf TE |
21 | static void nfc_llcp_rx_skb(struct nfc_llcp_local *local, struct sk_buff *skb); |
22 | ||
a69f32af | 23 | void nfc_llcp_sock_link(struct llcp_sock_list *l, struct sock *sk) |
d646960f | 24 | { |
a69f32af SO |
25 | write_lock(&l->lock); |
26 | sk_add_node(sk, &l->head); | |
27 | write_unlock(&l->lock); | |
28 | } | |
d646960f | 29 | |
a69f32af SO |
30 | void nfc_llcp_sock_unlink(struct llcp_sock_list *l, struct sock *sk) |
31 | { | |
32 | write_lock(&l->lock); | |
33 | sk_del_node_init(sk); | |
34 | write_unlock(&l->lock); | |
35 | } | |
d646960f | 36 | |
abd18d43 TE |
37 | void nfc_llcp_socket_remote_param_init(struct nfc_llcp_sock *sock) |
38 | { | |
39 | sock->remote_rw = LLCP_DEFAULT_RW; | |
40 | sock->remote_miu = LLCP_MAX_MIU + 1; | |
41 | } | |
42 | ||
f31652a5 SO |
43 | static void nfc_llcp_socket_purge(struct nfc_llcp_sock *sock) |
44 | { | |
45 | struct nfc_llcp_local *local = sock->local; | |
46 | struct sk_buff *s, *tmp; | |
47 | ||
48 | pr_debug("%p\n", &sock->sk); | |
49 | ||
50 | skb_queue_purge(&sock->tx_queue); | |
51 | skb_queue_purge(&sock->tx_pending_queue); | |
f31652a5 SO |
52 | |
53 | if (local == NULL) | |
54 | return; | |
55 | ||
56 | /* Search for local pending SKBs that are related to this socket */ | |
57 | skb_queue_walk_safe(&local->tx_queue, s, tmp) { | |
58 | if (s->sk != &sock->sk) | |
59 | continue; | |
60 | ||
61 | skb_unlink(s, &local->tx_queue); | |
62 | kfree_skb(s); | |
63 | } | |
64 | } | |
65 | ||
b436a13d | 66 | static void nfc_llcp_socket_release(struct nfc_llcp_local *local, bool device, |
3bbc0ceb | 67 | int err) |
a69f32af SO |
68 | { |
69 | struct sock *sk; | |
b67bfe0d | 70 | struct hlist_node *tmp; |
a69f32af | 71 | struct nfc_llcp_sock *llcp_sock; |
d646960f | 72 | |
f31652a5 SO |
73 | skb_queue_purge(&local->tx_queue); |
74 | ||
a69f32af | 75 | write_lock(&local->sockets.lock); |
40c75f81 | 76 | |
b67bfe0d | 77 | sk_for_each_safe(sk, tmp, &local->sockets.head) { |
a69f32af | 78 | llcp_sock = nfc_llcp_sock(sk); |
d646960f | 79 | |
50b78b2a | 80 | bh_lock_sock(sk); |
d646960f | 81 | |
f31652a5 SO |
82 | nfc_llcp_socket_purge(llcp_sock); |
83 | ||
a69f32af SO |
84 | if (sk->sk_state == LLCP_CONNECTED) |
85 | nfc_put_device(llcp_sock->dev); | |
d646960f | 86 | |
a69f32af | 87 | if (sk->sk_state == LLCP_LISTEN) { |
d646960f SO |
88 | struct nfc_llcp_sock *lsk, *n; |
89 | struct sock *accept_sk; | |
90 | ||
0f450772 SJ |
91 | list_for_each_entry_safe(lsk, n, |
92 | &llcp_sock->accept_queue, | |
427a2eb1 | 93 | accept_queue) { |
d646960f | 94 | accept_sk = &lsk->sk; |
50b78b2a | 95 | bh_lock_sock(accept_sk); |
d646960f SO |
96 | |
97 | nfc_llcp_accept_unlink(accept_sk); | |
98 | ||
3bbc0ceb SO |
99 | if (err) |
100 | accept_sk->sk_err = err; | |
d646960f | 101 | accept_sk->sk_state = LLCP_CLOSED; |
3bbc0ceb | 102 | accept_sk->sk_state_change(sk); |
d646960f | 103 | |
50b78b2a | 104 | bh_unlock_sock(accept_sk); |
d646960f | 105 | } |
c8512be6 SO |
106 | } |
107 | ||
3bbc0ceb SO |
108 | if (err) |
109 | sk->sk_err = err; | |
a69f32af | 110 | sk->sk_state = LLCP_CLOSED; |
3bbc0ceb | 111 | sk->sk_state_change(sk); |
d646960f | 112 | |
50b78b2a | 113 | bh_unlock_sock(sk); |
d646960f | 114 | |
a69f32af | 115 | sk_del_node_init(sk); |
d646960f SO |
116 | } |
117 | ||
a69f32af | 118 | write_unlock(&local->sockets.lock); |
e6a3a4bb | 119 | |
b436a13d SO |
120 | /* If we still have a device, we keep the RAW sockets alive */ |
121 | if (device == true) | |
e6a3a4bb SO |
122 | return; |
123 | ||
124 | write_lock(&local->raw_sockets.lock); | |
125 | ||
126 | sk_for_each_safe(sk, tmp, &local->raw_sockets.head) { | |
127 | llcp_sock = nfc_llcp_sock(sk); | |
128 | ||
129 | bh_lock_sock(sk); | |
130 | ||
131 | nfc_llcp_socket_purge(llcp_sock); | |
132 | ||
3bbc0ceb SO |
133 | if (err) |
134 | sk->sk_err = err; | |
e6a3a4bb | 135 | sk->sk_state = LLCP_CLOSED; |
e6a3a4bb SO |
136 | sk->sk_state_change(sk); |
137 | ||
138 | bh_unlock_sock(sk); | |
139 | ||
e6a3a4bb SO |
140 | sk_del_node_init(sk); |
141 | } | |
142 | ||
143 | write_unlock(&local->raw_sockets.lock); | |
d646960f SO |
144 | } |
145 | ||
c7aa1225 SO |
146 | struct nfc_llcp_local *nfc_llcp_local_get(struct nfc_llcp_local *local) |
147 | { | |
148 | kref_get(&local->ref); | |
149 | ||
150 | return local; | |
151 | } | |
152 | ||
c470e319 | 153 | static void local_cleanup(struct nfc_llcp_local *local) |
c7aa1225 | 154 | { |
c470e319 | 155 | nfc_llcp_socket_release(local, false, ENXIO); |
c7aa1225 SO |
156 | del_timer_sync(&local->link_timer); |
157 | skb_queue_purge(&local->tx_queue); | |
474fee3d TH |
158 | cancel_work_sync(&local->tx_work); |
159 | cancel_work_sync(&local->rx_work); | |
160 | cancel_work_sync(&local->timeout_work); | |
c7aa1225 | 161 | kfree_skb(local->rx_pending); |
40213fa8 TE |
162 | del_timer_sync(&local->sdreq_timer); |
163 | cancel_work_sync(&local->sdreq_timeout_work); | |
d9b8d8e1 | 164 | nfc_llcp_free_sdp_tlv_list(&local->pending_sdreqs); |
3536da06 SO |
165 | } |
166 | ||
167 | static void local_release(struct kref *ref) | |
168 | { | |
169 | struct nfc_llcp_local *local; | |
170 | ||
171 | local = container_of(ref, struct nfc_llcp_local, ref); | |
172 | ||
173 | list_del(&local->list); | |
c470e319 | 174 | local_cleanup(local); |
c7aa1225 SO |
175 | kfree(local); |
176 | } | |
177 | ||
178 | int nfc_llcp_local_put(struct nfc_llcp_local *local) | |
179 | { | |
a69f32af SO |
180 | if (local == NULL) |
181 | return 0; | |
182 | ||
c7aa1225 SO |
183 | return kref_put(&local->ref, local_release); |
184 | } | |
185 | ||
8f50020e SO |
186 | static struct nfc_llcp_sock *nfc_llcp_sock_get(struct nfc_llcp_local *local, |
187 | u8 ssap, u8 dsap) | |
188 | { | |
189 | struct sock *sk; | |
a8df0f37 | 190 | struct nfc_llcp_sock *llcp_sock, *tmp_sock; |
8f50020e SO |
191 | |
192 | pr_debug("ssap dsap %d %d\n", ssap, dsap); | |
193 | ||
194 | if (ssap == 0 && dsap == 0) | |
195 | return NULL; | |
196 | ||
197 | read_lock(&local->sockets.lock); | |
198 | ||
199 | llcp_sock = NULL; | |
200 | ||
b67bfe0d | 201 | sk_for_each(sk, &local->sockets.head) { |
a8df0f37 | 202 | tmp_sock = nfc_llcp_sock(sk); |
8f50020e | 203 | |
a8df0f37 SO |
204 | if (tmp_sock->ssap == ssap && tmp_sock->dsap == dsap) { |
205 | llcp_sock = tmp_sock; | |
8f50020e | 206 | break; |
a8df0f37 | 207 | } |
8f50020e SO |
208 | } |
209 | ||
210 | read_unlock(&local->sockets.lock); | |
211 | ||
212 | if (llcp_sock == NULL) | |
213 | return NULL; | |
214 | ||
215 | sock_hold(&llcp_sock->sk); | |
216 | ||
217 | return llcp_sock; | |
218 | } | |
219 | ||
220 | static void nfc_llcp_sock_put(struct nfc_llcp_sock *sock) | |
221 | { | |
222 | sock_put(&sock->sk); | |
223 | } | |
224 | ||
d646960f SO |
225 | static void nfc_llcp_timeout_work(struct work_struct *work) |
226 | { | |
227 | struct nfc_llcp_local *local = container_of(work, struct nfc_llcp_local, | |
427a2eb1 | 228 | timeout_work); |
d646960f SO |
229 | |
230 | nfc_dep_link_down(local->dev); | |
231 | } | |
232 | ||
4b519bb4 | 233 | static void nfc_llcp_symm_timer(struct timer_list *t) |
d646960f | 234 | { |
4b519bb4 | 235 | struct nfc_llcp_local *local = from_timer(local, t, link_timer); |
d646960f SO |
236 | |
237 | pr_err("SYMM timeout\n"); | |
238 | ||
916082b0 | 239 | schedule_work(&local->timeout_work); |
d646960f SO |
240 | } |
241 | ||
40213fa8 TE |
242 | static void nfc_llcp_sdreq_timeout_work(struct work_struct *work) |
243 | { | |
244 | unsigned long time; | |
245 | HLIST_HEAD(nl_sdres_list); | |
246 | struct hlist_node *n; | |
247 | struct nfc_llcp_sdp_tlv *sdp; | |
248 | struct nfc_llcp_local *local = container_of(work, struct nfc_llcp_local, | |
249 | sdreq_timeout_work); | |
250 | ||
251 | mutex_lock(&local->sdreq_lock); | |
252 | ||
253 | time = jiffies - msecs_to_jiffies(3 * local->remote_lto); | |
254 | ||
255 | hlist_for_each_entry_safe(sdp, n, &local->pending_sdreqs, node) { | |
256 | if (time_after(sdp->time, time)) | |
257 | continue; | |
258 | ||
259 | sdp->sap = LLCP_SDP_UNBOUND; | |
260 | ||
261 | hlist_del(&sdp->node); | |
262 | ||
263 | hlist_add_head(&sdp->node, &nl_sdres_list); | |
264 | } | |
265 | ||
266 | if (!hlist_empty(&local->pending_sdreqs)) | |
267 | mod_timer(&local->sdreq_timer, | |
268 | jiffies + msecs_to_jiffies(3 * local->remote_lto)); | |
269 | ||
270 | mutex_unlock(&local->sdreq_lock); | |
271 | ||
272 | if (!hlist_empty(&nl_sdres_list)) | |
273 | nfc_genl_llc_send_sdres(local->dev, &nl_sdres_list); | |
274 | } | |
275 | ||
4b519bb4 | 276 | static void nfc_llcp_sdreq_timer(struct timer_list *t) |
40213fa8 | 277 | { |
4b519bb4 | 278 | struct nfc_llcp_local *local = from_timer(local, t, sdreq_timer); |
40213fa8 TE |
279 | |
280 | schedule_work(&local->sdreq_timeout_work); | |
281 | } | |
282 | ||
d646960f SO |
283 | struct nfc_llcp_local *nfc_llcp_find_local(struct nfc_dev *dev) |
284 | { | |
29e27dd8 | 285 | struct nfc_llcp_local *local; |
d646960f | 286 | |
29e27dd8 | 287 | list_for_each_entry(local, &llcp_devices, list) |
d646960f SO |
288 | if (local->dev == dev) |
289 | return local; | |
290 | ||
291 | pr_debug("No device found\n"); | |
292 | ||
293 | return NULL; | |
294 | } | |
295 | ||
296 | static char *wks[] = { | |
297 | NULL, | |
298 | NULL, /* SDP */ | |
299 | "urn:nfc:sn:ip", | |
300 | "urn:nfc:sn:obex", | |
301 | "urn:nfc:sn:snep", | |
302 | }; | |
303 | ||
304 | static int nfc_llcp_wks_sap(char *service_name, size_t service_name_len) | |
305 | { | |
306 | int sap, num_wks; | |
307 | ||
308 | pr_debug("%s\n", service_name); | |
309 | ||
310 | if (service_name == NULL) | |
311 | return -EINVAL; | |
312 | ||
313 | num_wks = ARRAY_SIZE(wks); | |
314 | ||
427a2eb1 | 315 | for (sap = 0; sap < num_wks; sap++) { |
d646960f SO |
316 | if (wks[sap] == NULL) |
317 | continue; | |
318 | ||
319 | if (strncmp(wks[sap], service_name, service_name_len) == 0) | |
320 | return sap; | |
321 | } | |
322 | ||
323 | return -EINVAL; | |
324 | } | |
325 | ||
8f50020e SO |
326 | static |
327 | struct nfc_llcp_sock *nfc_llcp_sock_from_sn(struct nfc_llcp_local *local, | |
328 | u8 *sn, size_t sn_len) | |
329 | { | |
330 | struct sock *sk; | |
8f50020e SO |
331 | struct nfc_llcp_sock *llcp_sock, *tmp_sock; |
332 | ||
333 | pr_debug("sn %zd %p\n", sn_len, sn); | |
334 | ||
335 | if (sn == NULL || sn_len == 0) | |
336 | return NULL; | |
337 | ||
338 | read_lock(&local->sockets.lock); | |
339 | ||
340 | llcp_sock = NULL; | |
341 | ||
b67bfe0d | 342 | sk_for_each(sk, &local->sockets.head) { |
8f50020e SO |
343 | tmp_sock = nfc_llcp_sock(sk); |
344 | ||
345 | pr_debug("llcp sock %p\n", tmp_sock); | |
346 | ||
54292d64 SO |
347 | if (tmp_sock->sk.sk_type == SOCK_STREAM && |
348 | tmp_sock->sk.sk_state != LLCP_LISTEN) | |
349 | continue; | |
350 | ||
351 | if (tmp_sock->sk.sk_type == SOCK_DGRAM && | |
352 | tmp_sock->sk.sk_state != LLCP_BOUND) | |
8f50020e SO |
353 | continue; |
354 | ||
355 | if (tmp_sock->service_name == NULL || | |
356 | tmp_sock->service_name_len == 0) | |
357 | continue; | |
358 | ||
359 | if (tmp_sock->service_name_len != sn_len) | |
360 | continue; | |
361 | ||
362 | if (memcmp(sn, tmp_sock->service_name, sn_len) == 0) { | |
363 | llcp_sock = tmp_sock; | |
364 | break; | |
365 | } | |
366 | } | |
367 | ||
368 | read_unlock(&local->sockets.lock); | |
369 | ||
370 | pr_debug("Found llcp sock %p\n", llcp_sock); | |
371 | ||
372 | return llcp_sock; | |
373 | } | |
374 | ||
d646960f | 375 | u8 nfc_llcp_get_sdp_ssap(struct nfc_llcp_local *local, |
427a2eb1 | 376 | struct nfc_llcp_sock *sock) |
d646960f SO |
377 | { |
378 | mutex_lock(&local->sdp_lock); | |
379 | ||
380 | if (sock->service_name != NULL && sock->service_name_len > 0) { | |
381 | int ssap = nfc_llcp_wks_sap(sock->service_name, | |
427a2eb1 | 382 | sock->service_name_len); |
d646960f SO |
383 | |
384 | if (ssap > 0) { | |
385 | pr_debug("WKS %d\n", ssap); | |
386 | ||
387 | /* This is a WKS, let's check if it's free */ | |
388 | if (local->local_wks & BIT(ssap)) { | |
389 | mutex_unlock(&local->sdp_lock); | |
390 | ||
391 | return LLCP_SAP_MAX; | |
392 | } | |
393 | ||
1762c17c | 394 | set_bit(ssap, &local->local_wks); |
d646960f SO |
395 | mutex_unlock(&local->sdp_lock); |
396 | ||
397 | return ssap; | |
398 | } | |
399 | ||
400 | /* | |
8f50020e SO |
401 | * Check if there already is a non WKS socket bound |
402 | * to this service name. | |
d646960f | 403 | */ |
8f50020e SO |
404 | if (nfc_llcp_sock_from_sn(local, sock->service_name, |
405 | sock->service_name_len) != NULL) { | |
d646960f SO |
406 | mutex_unlock(&local->sdp_lock); |
407 | ||
408 | return LLCP_SAP_MAX; | |
409 | } | |
410 | ||
d646960f SO |
411 | mutex_unlock(&local->sdp_lock); |
412 | ||
8f50020e | 413 | return LLCP_SDP_UNBOUND; |
d646960f | 414 | |
ebbb16d9 SO |
415 | } else if (sock->ssap != 0 && sock->ssap < LLCP_WKS_NUM_SAP) { |
416 | if (!test_bit(sock->ssap, &local->local_wks)) { | |
417 | set_bit(sock->ssap, &local->local_wks); | |
418 | mutex_unlock(&local->sdp_lock); | |
d646960f | 419 | |
ebbb16d9 | 420 | return sock->ssap; |
d646960f SO |
421 | } |
422 | } | |
423 | ||
424 | mutex_unlock(&local->sdp_lock); | |
425 | ||
426 | return LLCP_SAP_MAX; | |
427 | } | |
428 | ||
429 | u8 nfc_llcp_get_local_ssap(struct nfc_llcp_local *local) | |
430 | { | |
431 | u8 local_ssap; | |
432 | ||
433 | mutex_lock(&local->sdp_lock); | |
434 | ||
435 | local_ssap = find_first_zero_bit(&local->local_sap, LLCP_LOCAL_NUM_SAP); | |
436 | if (local_ssap == LLCP_LOCAL_NUM_SAP) { | |
437 | mutex_unlock(&local->sdp_lock); | |
438 | return LLCP_SAP_MAX; | |
439 | } | |
440 | ||
1762c17c | 441 | set_bit(local_ssap, &local->local_sap); |
d646960f SO |
442 | |
443 | mutex_unlock(&local->sdp_lock); | |
444 | ||
445 | return local_ssap + LLCP_LOCAL_SAP_OFFSET; | |
446 | } | |
447 | ||
448 | void nfc_llcp_put_ssap(struct nfc_llcp_local *local, u8 ssap) | |
449 | { | |
450 | u8 local_ssap; | |
451 | unsigned long *sdp; | |
452 | ||
453 | if (ssap < LLCP_WKS_NUM_SAP) { | |
454 | local_ssap = ssap; | |
455 | sdp = &local->local_wks; | |
456 | } else if (ssap < LLCP_LOCAL_NUM_SAP) { | |
8f50020e SO |
457 | atomic_t *client_cnt; |
458 | ||
d646960f SO |
459 | local_ssap = ssap - LLCP_WKS_NUM_SAP; |
460 | sdp = &local->local_sdp; | |
8f50020e SO |
461 | client_cnt = &local->local_sdp_cnt[local_ssap]; |
462 | ||
463 | pr_debug("%d clients\n", atomic_read(client_cnt)); | |
464 | ||
465 | mutex_lock(&local->sdp_lock); | |
466 | ||
467 | if (atomic_dec_and_test(client_cnt)) { | |
468 | struct nfc_llcp_sock *l_sock; | |
469 | ||
470 | pr_debug("No more clients for SAP %d\n", ssap); | |
471 | ||
472 | clear_bit(local_ssap, sdp); | |
473 | ||
474 | /* Find the listening sock and set it back to UNBOUND */ | |
475 | l_sock = nfc_llcp_sock_get(local, ssap, LLCP_SAP_SDP); | |
476 | if (l_sock) { | |
477 | l_sock->ssap = LLCP_SDP_UNBOUND; | |
478 | nfc_llcp_sock_put(l_sock); | |
479 | } | |
480 | } | |
481 | ||
482 | mutex_unlock(&local->sdp_lock); | |
483 | ||
484 | return; | |
d646960f SO |
485 | } else if (ssap < LLCP_MAX_SAP) { |
486 | local_ssap = ssap - LLCP_LOCAL_NUM_SAP; | |
487 | sdp = &local->local_sap; | |
488 | } else { | |
489 | return; | |
490 | } | |
491 | ||
492 | mutex_lock(&local->sdp_lock); | |
493 | ||
1762c17c | 494 | clear_bit(local_ssap, sdp); |
d646960f SO |
495 | |
496 | mutex_unlock(&local->sdp_lock); | |
497 | } | |
498 | ||
8f50020e SO |
499 | static u8 nfc_llcp_reserve_sdp_ssap(struct nfc_llcp_local *local) |
500 | { | |
501 | u8 ssap; | |
502 | ||
503 | mutex_lock(&local->sdp_lock); | |
504 | ||
505 | ssap = find_first_zero_bit(&local->local_sdp, LLCP_SDP_NUM_SAP); | |
506 | if (ssap == LLCP_SDP_NUM_SAP) { | |
507 | mutex_unlock(&local->sdp_lock); | |
508 | ||
509 | return LLCP_SAP_MAX; | |
510 | } | |
511 | ||
512 | pr_debug("SDP ssap %d\n", LLCP_WKS_NUM_SAP + ssap); | |
513 | ||
514 | set_bit(ssap, &local->local_sdp); | |
515 | ||
516 | mutex_unlock(&local->sdp_lock); | |
517 | ||
518 | return LLCP_WKS_NUM_SAP + ssap; | |
519 | } | |
520 | ||
d646960f SO |
521 | static int nfc_llcp_build_gb(struct nfc_llcp_local *local) |
522 | { | |
58bdd544 Y |
523 | u8 *gb_cur, version, version_length; |
524 | u8 lto_length, wks_length, miux_length; | |
525 | u8 *version_tlv = NULL, *lto_tlv = NULL, | |
526 | *wks_tlv = NULL, *miux_tlv = NULL; | |
4ca546e5 | 527 | __be16 wks = cpu_to_be16(local->local_wks); |
d646960f | 528 | u8 gb_len = 0; |
52da2449 | 529 | int ret = 0; |
d646960f SO |
530 | |
531 | version = LLCP_VERSION_11; | |
532 | version_tlv = nfc_llcp_build_tlv(LLCP_TLV_VERSION, &version, | |
427a2eb1 | 533 | 1, &version_length); |
58bdd544 Y |
534 | if (!version_tlv) { |
535 | ret = -ENOMEM; | |
536 | goto out; | |
537 | } | |
d646960f SO |
538 | gb_len += version_length; |
539 | ||
52feb444 | 540 | lto_tlv = nfc_llcp_build_tlv(LLCP_TLV_LTO, &local->lto, 1, <o_length); |
58bdd544 Y |
541 | if (!lto_tlv) { |
542 | ret = -ENOMEM; | |
543 | goto out; | |
544 | } | |
d646960f SO |
545 | gb_len += lto_length; |
546 | ||
547 | pr_debug("Local wks 0x%lx\n", local->local_wks); | |
4ca546e5 | 548 | wks_tlv = nfc_llcp_build_tlv(LLCP_TLV_WKS, (u8 *)&wks, 2, &wks_length); |
58bdd544 Y |
549 | if (!wks_tlv) { |
550 | ret = -ENOMEM; | |
551 | goto out; | |
552 | } | |
d646960f SO |
553 | gb_len += wks_length; |
554 | ||
52feb444 | 555 | miux_tlv = nfc_llcp_build_tlv(LLCP_TLV_MIUX, (u8 *)&local->miux, 0, |
56d5876a | 556 | &miux_length); |
58bdd544 Y |
557 | if (!miux_tlv) { |
558 | ret = -ENOMEM; | |
559 | goto out; | |
560 | } | |
56d5876a SO |
561 | gb_len += miux_length; |
562 | ||
d646960f SO |
563 | gb_len += ARRAY_SIZE(llcp_magic); |
564 | ||
565 | if (gb_len > NFC_MAX_GT_LEN) { | |
52da2449 WY |
566 | ret = -EINVAL; |
567 | goto out; | |
d646960f SO |
568 | } |
569 | ||
570 | gb_cur = local->gb; | |
571 | ||
572 | memcpy(gb_cur, llcp_magic, ARRAY_SIZE(llcp_magic)); | |
573 | gb_cur += ARRAY_SIZE(llcp_magic); | |
574 | ||
575 | memcpy(gb_cur, version_tlv, version_length); | |
576 | gb_cur += version_length; | |
577 | ||
578 | memcpy(gb_cur, lto_tlv, lto_length); | |
579 | gb_cur += lto_length; | |
580 | ||
581 | memcpy(gb_cur, wks_tlv, wks_length); | |
582 | gb_cur += wks_length; | |
583 | ||
56d5876a SO |
584 | memcpy(gb_cur, miux_tlv, miux_length); |
585 | gb_cur += miux_length; | |
586 | ||
52da2449 WY |
587 | local->gb_len = gb_len; |
588 | ||
589 | out: | |
d646960f SO |
590 | kfree(version_tlv); |
591 | kfree(lto_tlv); | |
52da2449 WY |
592 | kfree(wks_tlv); |
593 | kfree(miux_tlv); | |
d646960f | 594 | |
52da2449 | 595 | return ret; |
d646960f SO |
596 | } |
597 | ||
b8e7a06d SO |
598 | u8 *nfc_llcp_general_bytes(struct nfc_dev *dev, size_t *general_bytes_len) |
599 | { | |
600 | struct nfc_llcp_local *local; | |
601 | ||
602 | local = nfc_llcp_find_local(dev); | |
603 | if (local == NULL) { | |
604 | *general_bytes_len = 0; | |
605 | return NULL; | |
606 | } | |
607 | ||
608 | nfc_llcp_build_gb(local); | |
609 | ||
610 | *general_bytes_len = local->gb_len; | |
611 | ||
612 | return local->gb; | |
613 | } | |
614 | ||
d646960f SO |
615 | int nfc_llcp_set_remote_gb(struct nfc_dev *dev, u8 *gb, u8 gb_len) |
616 | { | |
3143a4ca AL |
617 | struct nfc_llcp_local *local; |
618 | ||
619 | if (gb_len < 3 || gb_len > NFC_MAX_GT_LEN) | |
620 | return -EINVAL; | |
d646960f | 621 | |
3143a4ca | 622 | local = nfc_llcp_find_local(dev); |
d646960f SO |
623 | if (local == NULL) { |
624 | pr_err("No LLCP device\n"); | |
625 | return -ENODEV; | |
626 | } | |
627 | ||
628 | memset(local->remote_gb, 0, NFC_MAX_GT_LEN); | |
629 | memcpy(local->remote_gb, gb, gb_len); | |
630 | local->remote_gb_len = gb_len; | |
631 | ||
d646960f SO |
632 | if (memcmp(local->remote_gb, llcp_magic, 3)) { |
633 | pr_err("MAC does not support LLCP\n"); | |
634 | return -EINVAL; | |
635 | } | |
636 | ||
7a06e586 SO |
637 | return nfc_llcp_parse_gb_tlv(local, |
638 | &local->remote_gb[3], | |
639 | local->remote_gb_len - 3); | |
d646960f SO |
640 | } |
641 | ||
d646960f SO |
642 | static u8 nfc_llcp_dsap(struct sk_buff *pdu) |
643 | { | |
644 | return (pdu->data[0] & 0xfc) >> 2; | |
645 | } | |
646 | ||
647 | static u8 nfc_llcp_ptype(struct sk_buff *pdu) | |
648 | { | |
649 | return ((pdu->data[0] & 0x03) << 2) | ((pdu->data[1] & 0xc0) >> 6); | |
650 | } | |
651 | ||
652 | static u8 nfc_llcp_ssap(struct sk_buff *pdu) | |
653 | { | |
654 | return pdu->data[1] & 0x3f; | |
655 | } | |
656 | ||
657 | static u8 nfc_llcp_ns(struct sk_buff *pdu) | |
658 | { | |
659 | return pdu->data[2] >> 4; | |
660 | } | |
661 | ||
662 | static u8 nfc_llcp_nr(struct sk_buff *pdu) | |
663 | { | |
664 | return pdu->data[2] & 0xf; | |
665 | } | |
666 | ||
667 | static void nfc_llcp_set_nrns(struct nfc_llcp_sock *sock, struct sk_buff *pdu) | |
668 | { | |
279cf174 | 669 | pdu->data[2] = (sock->send_n << 4) | (sock->recv_n); |
d646960f SO |
670 | sock->send_n = (sock->send_n + 1) % 16; |
671 | sock->recv_ack_n = (sock->recv_n - 1) % 16; | |
672 | } | |
673 | ||
4463523b TE |
674 | void nfc_llcp_send_to_raw_sock(struct nfc_llcp_local *local, |
675 | struct sk_buff *skb, u8 direction) | |
676 | { | |
4463523b TE |
677 | struct sk_buff *skb_copy = NULL, *nskb; |
678 | struct sock *sk; | |
679 | u8 *data; | |
680 | ||
681 | read_lock(&local->raw_sockets.lock); | |
682 | ||
b67bfe0d | 683 | sk_for_each(sk, &local->raw_sockets.head) { |
4463523b TE |
684 | if (sk->sk_state != LLCP_BOUND) |
685 | continue; | |
686 | ||
687 | if (skb_copy == NULL) { | |
bad93e9d OP |
688 | skb_copy = __pskb_copy_fclone(skb, NFC_RAW_HEADER_SIZE, |
689 | GFP_ATOMIC, true); | |
4463523b TE |
690 | |
691 | if (skb_copy == NULL) | |
692 | continue; | |
693 | ||
57be1f3f | 694 | data = skb_push(skb_copy, NFC_RAW_HEADER_SIZE); |
4463523b TE |
695 | |
696 | data[0] = local->dev ? local->dev->idx : 0xFF; | |
57be1f3f HT |
697 | data[1] = direction & 0x01; |
698 | data[1] |= (RAW_PAYLOAD_LLCP << 1); | |
4463523b TE |
699 | } |
700 | ||
701 | nskb = skb_clone(skb_copy, GFP_ATOMIC); | |
702 | if (!nskb) | |
703 | continue; | |
704 | ||
705 | if (sock_queue_rcv_skb(sk, nskb)) | |
706 | kfree_skb(nskb); | |
707 | } | |
708 | ||
709 | read_unlock(&local->raw_sockets.lock); | |
710 | ||
711 | kfree_skb(skb_copy); | |
712 | } | |
713 | ||
84457960 SO |
714 | static void nfc_llcp_tx_work(struct work_struct *work) |
715 | { | |
716 | struct nfc_llcp_local *local = container_of(work, struct nfc_llcp_local, | |
717 | tx_work); | |
718 | struct sk_buff *skb; | |
719 | struct sock *sk; | |
720 | struct nfc_llcp_sock *llcp_sock; | |
721 | ||
722 | skb = skb_dequeue(&local->tx_queue); | |
723 | if (skb != NULL) { | |
724 | sk = skb->sk; | |
725 | llcp_sock = nfc_llcp_sock(sk); | |
a6a0915f SO |
726 | |
727 | if (llcp_sock == NULL && nfc_llcp_ptype(skb) == LLCP_PDU_I) { | |
f1b79dc8 | 728 | kfree_skb(skb); |
a6a0915f | 729 | nfc_llcp_send_symm(local->dev); |
2635a4bd SO |
730 | } else if (llcp_sock && !llcp_sock->remote_ready) { |
731 | skb_queue_head(&local->tx_queue, skb); | |
732 | nfc_llcp_send_symm(local->dev); | |
a6a0915f | 733 | } else { |
be02b6b6 SO |
734 | struct sk_buff *copy_skb = NULL; |
735 | u8 ptype = nfc_llcp_ptype(skb); | |
84457960 SO |
736 | int ret; |
737 | ||
738 | pr_debug("Sending pending skb\n"); | |
806bfe31 TE |
739 | print_hex_dump_debug("LLCP Tx: ", DUMP_PREFIX_OFFSET, |
740 | 16, 1, skb->data, skb->len, true); | |
84457960 | 741 | |
17f7ae16 TE |
742 | if (ptype == LLCP_PDU_DISC && sk != NULL && |
743 | sk->sk_state == LLCP_DISCONNECTING) { | |
744 | nfc_llcp_sock_unlink(&local->sockets, sk); | |
745 | sock_orphan(sk); | |
746 | sock_put(sk); | |
747 | } | |
748 | ||
be02b6b6 SO |
749 | if (ptype == LLCP_PDU_I) |
750 | copy_skb = skb_copy(skb, GFP_ATOMIC); | |
751 | ||
2c2d45bd TE |
752 | __net_timestamp(skb); |
753 | ||
4463523b | 754 | nfc_llcp_send_to_raw_sock(local, skb, |
57be1f3f | 755 | NFC_DIRECTION_TX); |
4463523b | 756 | |
84457960 SO |
757 | ret = nfc_data_exchange(local->dev, local->target_idx, |
758 | skb, nfc_llcp_recv, local); | |
759 | ||
be02b6b6 SO |
760 | if (ret) { |
761 | kfree_skb(copy_skb); | |
762 | goto out; | |
84457960 | 763 | } |
be02b6b6 SO |
764 | |
765 | if (ptype == LLCP_PDU_I && copy_skb) | |
766 | skb_queue_tail(&llcp_sock->tx_pending_queue, | |
767 | copy_skb); | |
84457960 SO |
768 | } |
769 | } else { | |
770 | nfc_llcp_send_symm(local->dev); | |
771 | } | |
772 | ||
be02b6b6 | 773 | out: |
84457960 SO |
774 | mod_timer(&local->link_timer, |
775 | jiffies + msecs_to_jiffies(2 * local->remote_lto)); | |
776 | } | |
777 | ||
a69f32af SO |
778 | static struct nfc_llcp_sock *nfc_llcp_connecting_sock_get(struct nfc_llcp_local *local, |
779 | u8 ssap) | |
780 | { | |
781 | struct sock *sk; | |
782 | struct nfc_llcp_sock *llcp_sock; | |
a69f32af SO |
783 | |
784 | read_lock(&local->connecting_sockets.lock); | |
785 | ||
b67bfe0d | 786 | sk_for_each(sk, &local->connecting_sockets.head) { |
a69f32af SO |
787 | llcp_sock = nfc_llcp_sock(sk); |
788 | ||
5a0f6f3b SO |
789 | if (llcp_sock->ssap == ssap) { |
790 | sock_hold(&llcp_sock->sk); | |
a69f32af | 791 | goto out; |
5a0f6f3b | 792 | } |
a69f32af SO |
793 | } |
794 | ||
795 | llcp_sock = NULL; | |
796 | ||
797 | out: | |
798 | read_unlock(&local->connecting_sockets.lock); | |
799 | ||
a69f32af SO |
800 | return llcp_sock; |
801 | } | |
802 | ||
a69f32af SO |
803 | static struct nfc_llcp_sock *nfc_llcp_sock_get_sn(struct nfc_llcp_local *local, |
804 | u8 *sn, size_t sn_len) | |
805 | { | |
a69f32af SO |
806 | struct nfc_llcp_sock *llcp_sock; |
807 | ||
8f50020e | 808 | llcp_sock = nfc_llcp_sock_from_sn(local, sn, sn_len); |
d646960f | 809 | |
a69f32af SO |
810 | if (llcp_sock == NULL) |
811 | return NULL; | |
d646960f | 812 | |
a69f32af SO |
813 | sock_hold(&llcp_sock->sk); |
814 | ||
815 | return llcp_sock; | |
d646960f SO |
816 | } |
817 | ||
d646960f SO |
818 | static u8 *nfc_llcp_connect_sn(struct sk_buff *skb, size_t *sn_len) |
819 | { | |
820 | u8 *tlv = &skb->data[2], type, length; | |
821 | size_t tlv_array_len = skb->len - LLCP_HEADER_SIZE, offset = 0; | |
822 | ||
823 | while (offset < tlv_array_len) { | |
824 | type = tlv[0]; | |
825 | length = tlv[1]; | |
826 | ||
827 | pr_debug("type 0x%x length %d\n", type, length); | |
828 | ||
829 | if (type == LLCP_TLV_SN) { | |
830 | *sn_len = length; | |
831 | return &tlv[2]; | |
832 | } | |
833 | ||
834 | offset += length + 2; | |
835 | tlv += length + 2; | |
836 | } | |
837 | ||
838 | return NULL; | |
839 | } | |
840 | ||
968272bf SO |
841 | static void nfc_llcp_recv_ui(struct nfc_llcp_local *local, |
842 | struct sk_buff *skb) | |
843 | { | |
844 | struct nfc_llcp_sock *llcp_sock; | |
845 | struct nfc_llcp_ui_cb *ui_cb; | |
846 | u8 dsap, ssap; | |
847 | ||
848 | dsap = nfc_llcp_dsap(skb); | |
849 | ssap = nfc_llcp_ssap(skb); | |
850 | ||
851 | ui_cb = nfc_llcp_ui_skb_cb(skb); | |
852 | ui_cb->dsap = dsap; | |
853 | ui_cb->ssap = ssap; | |
854 | ||
968272bf SO |
855 | pr_debug("%d %d\n", dsap, ssap); |
856 | ||
857 | /* We're looking for a bound socket, not a client one */ | |
858 | llcp_sock = nfc_llcp_sock_get(local, dsap, LLCP_SAP_SDP); | |
859 | if (llcp_sock == NULL || llcp_sock->sk.sk_type != SOCK_DGRAM) | |
860 | return; | |
861 | ||
862 | /* There is no sequence with UI frames */ | |
863 | skb_pull(skb, LLCP_HEADER_SIZE); | |
1727cf93 SO |
864 | if (!sock_queue_rcv_skb(&llcp_sock->sk, skb)) { |
865 | /* | |
866 | * UI frames will be freed from the socket layer, so we | |
867 | * need to keep them alive until someone receives them. | |
868 | */ | |
869 | skb_get(skb); | |
870 | } else { | |
871 | pr_err("Receive queue is full\n"); | |
968272bf SO |
872 | } |
873 | ||
874 | nfc_llcp_sock_put(llcp_sock); | |
875 | } | |
876 | ||
d646960f | 877 | static void nfc_llcp_recv_connect(struct nfc_llcp_local *local, |
427a2eb1 | 878 | struct sk_buff *skb) |
d646960f SO |
879 | { |
880 | struct sock *new_sk, *parent; | |
881 | struct nfc_llcp_sock *sock, *new_sock; | |
a69f32af | 882 | u8 dsap, ssap, reason; |
d646960f SO |
883 | |
884 | dsap = nfc_llcp_dsap(skb); | |
885 | ssap = nfc_llcp_ssap(skb); | |
886 | ||
887 | pr_debug("%d %d\n", dsap, ssap); | |
888 | ||
d646960f | 889 | if (dsap != LLCP_SAP_SDP) { |
a69f32af SO |
890 | sock = nfc_llcp_sock_get(local, dsap, LLCP_SAP_SDP); |
891 | if (sock == NULL || sock->sk.sk_state != LLCP_LISTEN) { | |
d646960f SO |
892 | reason = LLCP_DM_NOBOUND; |
893 | goto fail; | |
894 | } | |
d646960f SO |
895 | } else { |
896 | u8 *sn; | |
897 | size_t sn_len; | |
898 | ||
899 | sn = nfc_llcp_connect_sn(skb, &sn_len); | |
900 | if (sn == NULL) { | |
901 | reason = LLCP_DM_NOBOUND; | |
902 | goto fail; | |
903 | } | |
904 | ||
905 | pr_debug("Service name length %zu\n", sn_len); | |
906 | ||
a69f32af SO |
907 | sock = nfc_llcp_sock_get_sn(local, sn, sn_len); |
908 | if (sock == NULL) { | |
909 | reason = LLCP_DM_NOBOUND; | |
910 | goto fail; | |
d646960f | 911 | } |
d646960f SO |
912 | } |
913 | ||
a69f32af | 914 | lock_sock(&sock->sk); |
d646960f | 915 | |
d646960f SO |
916 | parent = &sock->sk; |
917 | ||
918 | if (sk_acceptq_is_full(parent)) { | |
919 | reason = LLCP_DM_REJ; | |
920 | release_sock(&sock->sk); | |
921 | sock_put(&sock->sk); | |
922 | goto fail; | |
923 | } | |
924 | ||
8f50020e SO |
925 | if (sock->ssap == LLCP_SDP_UNBOUND) { |
926 | u8 ssap = nfc_llcp_reserve_sdp_ssap(local); | |
927 | ||
928 | pr_debug("First client, reserving %d\n", ssap); | |
929 | ||
930 | if (ssap == LLCP_SAP_MAX) { | |
931 | reason = LLCP_DM_REJ; | |
932 | release_sock(&sock->sk); | |
933 | sock_put(&sock->sk); | |
934 | goto fail; | |
935 | } | |
936 | ||
937 | sock->ssap = ssap; | |
938 | } | |
939 | ||
11aa9c28 | 940 | new_sk = nfc_llcp_sock_alloc(NULL, parent->sk_type, GFP_ATOMIC, 0); |
d646960f SO |
941 | if (new_sk == NULL) { |
942 | reason = LLCP_DM_REJ; | |
943 | release_sock(&sock->sk); | |
944 | sock_put(&sock->sk); | |
945 | goto fail; | |
946 | } | |
947 | ||
948 | new_sock = nfc_llcp_sock(new_sk); | |
949 | new_sock->dev = local->dev; | |
c7aa1225 | 950 | new_sock->local = nfc_llcp_local_get(local); |
06d44f80 SO |
951 | new_sock->rw = sock->rw; |
952 | new_sock->miux = sock->miux; | |
d646960f | 953 | new_sock->nfc_protocol = sock->nfc_protocol; |
d646960f | 954 | new_sock->dsap = ssap; |
025f1520 | 955 | new_sock->target_idx = local->target_idx; |
d646960f | 956 | new_sock->parent = parent; |
8f50020e SO |
957 | new_sock->ssap = sock->ssap; |
958 | if (sock->ssap < LLCP_LOCAL_NUM_SAP && sock->ssap >= LLCP_WKS_NUM_SAP) { | |
959 | atomic_t *client_count; | |
960 | ||
961 | pr_debug("reserved_ssap %d for %p\n", sock->ssap, new_sock); | |
962 | ||
963 | client_count = | |
964 | &local->local_sdp_cnt[sock->ssap - LLCP_WKS_NUM_SAP]; | |
965 | ||
966 | atomic_inc(client_count); | |
967 | new_sock->reserved_ssap = sock->ssap; | |
968 | } | |
d646960f | 969 | |
7a06e586 SO |
970 | nfc_llcp_parse_connection_tlv(new_sock, &skb->data[LLCP_HEADER_SIZE], |
971 | skb->len - LLCP_HEADER_SIZE); | |
972 | ||
d646960f SO |
973 | pr_debug("new sock %p sk %p\n", new_sock, &new_sock->sk); |
974 | ||
a69f32af | 975 | nfc_llcp_sock_link(&local->sockets, new_sk); |
d646960f SO |
976 | |
977 | nfc_llcp_accept_enqueue(&sock->sk, new_sk); | |
978 | ||
979 | nfc_get_device(local->dev->idx); | |
980 | ||
981 | new_sk->sk_state = LLCP_CONNECTED; | |
982 | ||
983 | /* Wake the listening processes */ | |
676d2369 | 984 | parent->sk_data_ready(parent); |
d646960f SO |
985 | |
986 | /* Send CC */ | |
987 | nfc_llcp_send_cc(new_sock); | |
988 | ||
989 | release_sock(&sock->sk); | |
990 | sock_put(&sock->sk); | |
991 | ||
992 | return; | |
993 | ||
994 | fail: | |
995 | /* Send DM */ | |
996 | nfc_llcp_send_dm(local, dsap, ssap, reason); | |
d646960f SO |
997 | } |
998 | ||
d094afa1 | 999 | int nfc_llcp_queue_i_frames(struct nfc_llcp_sock *sock) |
4722d2b7 | 1000 | { |
d094afa1 | 1001 | int nr_frames = 0; |
4722d2b7 SO |
1002 | struct nfc_llcp_local *local = sock->local; |
1003 | ||
1004 | pr_debug("Remote ready %d tx queue len %d remote rw %d", | |
427a2eb1 | 1005 | sock->remote_ready, skb_queue_len(&sock->tx_pending_queue), |
e4306bec | 1006 | sock->remote_rw); |
4722d2b7 SO |
1007 | |
1008 | /* Try to queue some I frames for transmission */ | |
1009 | while (sock->remote_ready && | |
e4306bec | 1010 | skb_queue_len(&sock->tx_pending_queue) < sock->remote_rw) { |
84457960 | 1011 | struct sk_buff *pdu; |
4722d2b7 SO |
1012 | |
1013 | pdu = skb_dequeue(&sock->tx_queue); | |
1014 | if (pdu == NULL) | |
1015 | break; | |
1016 | ||
1017 | /* Update N(S)/N(R) */ | |
1018 | nfc_llcp_set_nrns(sock, pdu); | |
1019 | ||
4722d2b7 | 1020 | skb_queue_tail(&local->tx_queue, pdu); |
d094afa1 | 1021 | nr_frames++; |
4722d2b7 | 1022 | } |
d094afa1 SO |
1023 | |
1024 | return nr_frames; | |
4722d2b7 SO |
1025 | } |
1026 | ||
d646960f | 1027 | static void nfc_llcp_recv_hdlc(struct nfc_llcp_local *local, |
427a2eb1 | 1028 | struct sk_buff *skb) |
d646960f SO |
1029 | { |
1030 | struct nfc_llcp_sock *llcp_sock; | |
1031 | struct sock *sk; | |
1032 | u8 dsap, ssap, ptype, ns, nr; | |
1033 | ||
1034 | ptype = nfc_llcp_ptype(skb); | |
1035 | dsap = nfc_llcp_dsap(skb); | |
1036 | ssap = nfc_llcp_ssap(skb); | |
1037 | ns = nfc_llcp_ns(skb); | |
1038 | nr = nfc_llcp_nr(skb); | |
1039 | ||
1040 | pr_debug("%d %d R %d S %d\n", dsap, ssap, nr, ns); | |
1041 | ||
1042 | llcp_sock = nfc_llcp_sock_get(local, dsap, ssap); | |
1043 | if (llcp_sock == NULL) { | |
1044 | nfc_llcp_send_dm(local, dsap, ssap, LLCP_DM_NOCONN); | |
1045 | return; | |
1046 | } | |
1047 | ||
1048 | sk = &llcp_sock->sk; | |
1049 | lock_sock(sk); | |
1050 | if (sk->sk_state == LLCP_CLOSED) { | |
1051 | release_sock(sk); | |
1052 | nfc_llcp_sock_put(llcp_sock); | |
1053 | } | |
1054 | ||
d646960f SO |
1055 | /* Pass the payload upstream */ |
1056 | if (ptype == LLCP_PDU_I) { | |
1057 | pr_debug("I frame, queueing on %p\n", &llcp_sock->sk); | |
1058 | ||
53aef920 SO |
1059 | if (ns == llcp_sock->recv_n) |
1060 | llcp_sock->recv_n = (llcp_sock->recv_n + 1) % 16; | |
1061 | else | |
1062 | pr_err("Received out of sequence I PDU\n"); | |
1063 | ||
d646960f | 1064 | skb_pull(skb, LLCP_HEADER_SIZE + LLCP_SEQUENCE_SIZE); |
1727cf93 SO |
1065 | if (!sock_queue_rcv_skb(&llcp_sock->sk, skb)) { |
1066 | /* | |
1067 | * I frames will be freed from the socket layer, so we | |
1068 | * need to keep them alive until someone receives them. | |
1069 | */ | |
1070 | skb_get(skb); | |
1071 | } else { | |
1072 | pr_err("Receive queue is full\n"); | |
d646960f SO |
1073 | } |
1074 | } | |
1075 | ||
1076 | /* Remove skbs from the pending queue */ | |
1077 | if (llcp_sock->send_ack_n != nr) { | |
1078 | struct sk_buff *s, *tmp; | |
28981491 | 1079 | u8 n; |
d646960f SO |
1080 | |
1081 | llcp_sock->send_ack_n = nr; | |
1082 | ||
84457960 SO |
1083 | /* Remove and free all skbs until ns == nr */ |
1084 | skb_queue_walk_safe(&llcp_sock->tx_pending_queue, s, tmp) { | |
28981491 WR |
1085 | n = nfc_llcp_ns(s); |
1086 | ||
84457960 SO |
1087 | skb_unlink(s, &llcp_sock->tx_pending_queue); |
1088 | kfree_skb(s); | |
1089 | ||
28981491 | 1090 | if (n == nr) |
84457960 SO |
1091 | break; |
1092 | } | |
1093 | ||
1094 | /* Re-queue the remaining skbs for transmission */ | |
1095 | skb_queue_reverse_walk_safe(&llcp_sock->tx_pending_queue, | |
1096 | s, tmp) { | |
1097 | skb_unlink(s, &llcp_sock->tx_pending_queue); | |
1098 | skb_queue_head(&local->tx_queue, s); | |
1099 | } | |
d646960f SO |
1100 | } |
1101 | ||
53aef920 SO |
1102 | if (ptype == LLCP_PDU_RR) |
1103 | llcp_sock->remote_ready = true; | |
427a2eb1 | 1104 | else if (ptype == LLCP_PDU_RNR) |
53aef920 SO |
1105 | llcp_sock->remote_ready = false; |
1106 | ||
56af2568 | 1107 | if (nfc_llcp_queue_i_frames(llcp_sock) == 0 && ptype == LLCP_PDU_I) |
d094afa1 | 1108 | nfc_llcp_send_rr(llcp_sock); |
d646960f SO |
1109 | |
1110 | release_sock(sk); | |
1111 | nfc_llcp_sock_put(llcp_sock); | |
1112 | } | |
1113 | ||
1114 | static void nfc_llcp_recv_disc(struct nfc_llcp_local *local, | |
427a2eb1 | 1115 | struct sk_buff *skb) |
d646960f SO |
1116 | { |
1117 | struct nfc_llcp_sock *llcp_sock; | |
1118 | struct sock *sk; | |
1119 | u8 dsap, ssap; | |
1120 | ||
1121 | dsap = nfc_llcp_dsap(skb); | |
1122 | ssap = nfc_llcp_ssap(skb); | |
1123 | ||
6d2cd978 SO |
1124 | if ((dsap == 0) && (ssap == 0)) { |
1125 | pr_debug("Connection termination"); | |
1126 | nfc_dep_link_down(local->dev); | |
1127 | return; | |
1128 | } | |
1129 | ||
d646960f SO |
1130 | llcp_sock = nfc_llcp_sock_get(local, dsap, ssap); |
1131 | if (llcp_sock == NULL) { | |
1132 | nfc_llcp_send_dm(local, dsap, ssap, LLCP_DM_NOCONN); | |
1133 | return; | |
1134 | } | |
1135 | ||
1136 | sk = &llcp_sock->sk; | |
1137 | lock_sock(sk); | |
f31652a5 SO |
1138 | |
1139 | nfc_llcp_socket_purge(llcp_sock); | |
1140 | ||
d646960f SO |
1141 | if (sk->sk_state == LLCP_CLOSED) { |
1142 | release_sock(sk); | |
1143 | nfc_llcp_sock_put(llcp_sock); | |
1144 | } | |
1145 | ||
d646960f SO |
1146 | if (sk->sk_state == LLCP_CONNECTED) { |
1147 | nfc_put_device(local->dev); | |
1148 | sk->sk_state = LLCP_CLOSED; | |
1149 | sk->sk_state_change(sk); | |
1150 | } | |
1151 | ||
1152 | nfc_llcp_send_dm(local, dsap, ssap, LLCP_DM_DISC); | |
1153 | ||
1154 | release_sock(sk); | |
1155 | nfc_llcp_sock_put(llcp_sock); | |
1156 | } | |
1157 | ||
427a2eb1 | 1158 | static void nfc_llcp_recv_cc(struct nfc_llcp_local *local, struct sk_buff *skb) |
d646960f SO |
1159 | { |
1160 | struct nfc_llcp_sock *llcp_sock; | |
ff353d86 | 1161 | struct sock *sk; |
d646960f SO |
1162 | u8 dsap, ssap; |
1163 | ||
d646960f SO |
1164 | dsap = nfc_llcp_dsap(skb); |
1165 | ssap = nfc_llcp_ssap(skb); | |
1166 | ||
a69f32af | 1167 | llcp_sock = nfc_llcp_connecting_sock_get(local, dsap); |
d646960f SO |
1168 | if (llcp_sock == NULL) { |
1169 | pr_err("Invalid CC\n"); | |
1170 | nfc_llcp_send_dm(local, dsap, ssap, LLCP_DM_NOCONN); | |
1171 | ||
1172 | return; | |
1173 | } | |
1174 | ||
ff353d86 | 1175 | sk = &llcp_sock->sk; |
d646960f | 1176 | |
a69f32af SO |
1177 | /* Unlink from connecting and link to the client array */ |
1178 | nfc_llcp_sock_unlink(&local->connecting_sockets, sk); | |
1179 | nfc_llcp_sock_link(&local->sockets, sk); | |
1180 | llcp_sock->dsap = ssap; | |
1181 | ||
7a06e586 SO |
1182 | nfc_llcp_parse_connection_tlv(llcp_sock, &skb->data[LLCP_HEADER_SIZE], |
1183 | skb->len - LLCP_HEADER_SIZE); | |
d646960f | 1184 | |
ff353d86 SO |
1185 | sk->sk_state = LLCP_CONNECTED; |
1186 | sk->sk_state_change(sk); | |
1187 | ||
d646960f SO |
1188 | nfc_llcp_sock_put(llcp_sock); |
1189 | } | |
1190 | ||
5c0560b7 SO |
1191 | static void nfc_llcp_recv_dm(struct nfc_llcp_local *local, struct sk_buff *skb) |
1192 | { | |
1193 | struct nfc_llcp_sock *llcp_sock; | |
1194 | struct sock *sk; | |
1195 | u8 dsap, ssap, reason; | |
1196 | ||
1197 | dsap = nfc_llcp_dsap(skb); | |
1198 | ssap = nfc_llcp_ssap(skb); | |
1199 | reason = skb->data[2]; | |
1200 | ||
1201 | pr_debug("%d %d reason %d\n", ssap, dsap, reason); | |
1202 | ||
1203 | switch (reason) { | |
1204 | case LLCP_DM_NOBOUND: | |
1205 | case LLCP_DM_REJ: | |
1206 | llcp_sock = nfc_llcp_connecting_sock_get(local, dsap); | |
1207 | break; | |
1208 | ||
1209 | default: | |
1210 | llcp_sock = nfc_llcp_sock_get(local, dsap, ssap); | |
1211 | break; | |
1212 | } | |
1213 | ||
1214 | if (llcp_sock == NULL) { | |
a8df0f37 | 1215 | pr_debug("Already closed\n"); |
5c0560b7 SO |
1216 | return; |
1217 | } | |
1218 | ||
1219 | sk = &llcp_sock->sk; | |
1220 | ||
1221 | sk->sk_err = ENXIO; | |
1222 | sk->sk_state = LLCP_CLOSED; | |
1223 | sk->sk_state_change(sk); | |
1224 | ||
1225 | nfc_llcp_sock_put(llcp_sock); | |
5c0560b7 SO |
1226 | } |
1227 | ||
19cfe584 SO |
1228 | static void nfc_llcp_recv_snl(struct nfc_llcp_local *local, |
1229 | struct sk_buff *skb) | |
1230 | { | |
1231 | struct nfc_llcp_sock *llcp_sock; | |
1232 | u8 dsap, ssap, *tlv, type, length, tid, sap; | |
1233 | u16 tlv_len, offset; | |
1234 | char *service_name; | |
1235 | size_t service_name_len; | |
e0ae7bac TE |
1236 | struct nfc_llcp_sdp_tlv *sdp; |
1237 | HLIST_HEAD(llc_sdres_list); | |
1238 | size_t sdres_tlvs_len; | |
d9b8d8e1 | 1239 | HLIST_HEAD(nl_sdres_list); |
19cfe584 SO |
1240 | |
1241 | dsap = nfc_llcp_dsap(skb); | |
1242 | ssap = nfc_llcp_ssap(skb); | |
1243 | ||
1244 | pr_debug("%d %d\n", dsap, ssap); | |
1245 | ||
1246 | if (dsap != LLCP_SAP_SDP || ssap != LLCP_SAP_SDP) { | |
1247 | pr_err("Wrong SNL SAP\n"); | |
1248 | return; | |
1249 | } | |
1250 | ||
1251 | tlv = &skb->data[LLCP_HEADER_SIZE]; | |
1252 | tlv_len = skb->len - LLCP_HEADER_SIZE; | |
1253 | offset = 0; | |
e0ae7bac | 1254 | sdres_tlvs_len = 0; |
19cfe584 | 1255 | |
0f450772 | 1256 | while (offset < tlv_len) { |
19cfe584 SO |
1257 | type = tlv[0]; |
1258 | length = tlv[1]; | |
1259 | ||
1260 | switch (type) { | |
1261 | case LLCP_TLV_SDREQ: | |
1262 | tid = tlv[2]; | |
1263 | service_name = (char *) &tlv[3]; | |
1264 | service_name_len = length - 1; | |
1265 | ||
e6904081 | 1266 | pr_debug("Looking for %.16s\n", service_name); |
19cfe584 SO |
1267 | |
1268 | if (service_name_len == strlen("urn:nfc:sn:sdp") && | |
1269 | !strncmp(service_name, "urn:nfc:sn:sdp", | |
1270 | service_name_len)) { | |
1271 | sap = 1; | |
e0ae7bac | 1272 | goto add_snl; |
e6904081 SO |
1273 | } |
1274 | ||
1275 | llcp_sock = nfc_llcp_sock_from_sn(local, service_name, | |
1276 | service_name_len); | |
1277 | if (!llcp_sock) { | |
1278 | sap = 0; | |
e0ae7bac | 1279 | goto add_snl; |
e6904081 SO |
1280 | } |
1281 | ||
1282 | /* | |
1283 | * We found a socket but its ssap has not been reserved | |
1284 | * yet. We need to assign it for good and send a reply. | |
1285 | * The ssap will be freed when the socket is closed. | |
1286 | */ | |
1287 | if (llcp_sock->ssap == LLCP_SDP_UNBOUND) { | |
1288 | atomic_t *client_count; | |
1289 | ||
1290 | sap = nfc_llcp_reserve_sdp_ssap(local); | |
1291 | ||
1292 | pr_debug("Reserving %d\n", sap); | |
1293 | ||
1294 | if (sap == LLCP_SAP_MAX) { | |
1295 | sap = 0; | |
e0ae7bac | 1296 | goto add_snl; |
e6904081 SO |
1297 | } |
1298 | ||
1299 | client_count = | |
1300 | &local->local_sdp_cnt[sap - | |
1301 | LLCP_WKS_NUM_SAP]; | |
1302 | ||
1303 | atomic_inc(client_count); | |
1304 | ||
1305 | llcp_sock->ssap = sap; | |
1306 | llcp_sock->reserved_ssap = sap; | |
19cfe584 | 1307 | } else { |
e6904081 | 1308 | sap = llcp_sock->ssap; |
19cfe584 SO |
1309 | } |
1310 | ||
e6904081 SO |
1311 | pr_debug("%p %d\n", llcp_sock, sap); |
1312 | ||
e0ae7bac TE |
1313 | add_snl: |
1314 | sdp = nfc_llcp_build_sdres_tlv(tid, sap); | |
1315 | if (sdp == NULL) | |
1316 | goto exit; | |
1317 | ||
1318 | sdres_tlvs_len += sdp->tlv_len; | |
1319 | hlist_add_head(&sdp->node, &llc_sdres_list); | |
19cfe584 SO |
1320 | break; |
1321 | ||
d9b8d8e1 TE |
1322 | case LLCP_TLV_SDRES: |
1323 | mutex_lock(&local->sdreq_lock); | |
1324 | ||
1325 | pr_debug("LLCP_TLV_SDRES: searching tid %d\n", tlv[2]); | |
1326 | ||
1327 | hlist_for_each_entry(sdp, &local->pending_sdreqs, node) { | |
1328 | if (sdp->tid != tlv[2]) | |
1329 | continue; | |
1330 | ||
1331 | sdp->sap = tlv[3]; | |
1332 | ||
1333 | pr_debug("Found: uri=%s, sap=%d\n", | |
1334 | sdp->uri, sdp->sap); | |
1335 | ||
1336 | hlist_del(&sdp->node); | |
1337 | ||
1338 | hlist_add_head(&sdp->node, &nl_sdres_list); | |
1339 | ||
1340 | break; | |
1341 | } | |
1342 | ||
1343 | mutex_unlock(&local->sdreq_lock); | |
1344 | break; | |
1345 | ||
19cfe584 SO |
1346 | default: |
1347 | pr_err("Invalid SNL tlv value 0x%x\n", type); | |
1348 | break; | |
1349 | } | |
1350 | ||
1351 | offset += length + 2; | |
1352 | tlv += length + 2; | |
1353 | } | |
e0ae7bac TE |
1354 | |
1355 | exit: | |
d9b8d8e1 TE |
1356 | if (!hlist_empty(&nl_sdres_list)) |
1357 | nfc_genl_llc_send_sdres(local->dev, &nl_sdres_list); | |
1358 | ||
e0ae7bac TE |
1359 | if (!hlist_empty(&llc_sdres_list)) |
1360 | nfc_llcp_send_snl_sdres(local, &llc_sdres_list, sdres_tlvs_len); | |
19cfe584 SO |
1361 | } |
1362 | ||
098dafcf | 1363 | static void nfc_llcp_recv_agf(struct nfc_llcp_local *local, struct sk_buff *skb) |
d646960f | 1364 | { |
098dafcf TE |
1365 | u8 ptype; |
1366 | u16 pdu_len; | |
1367 | struct sk_buff *new_skb; | |
d646960f | 1368 | |
098dafcf TE |
1369 | if (skb->len <= LLCP_HEADER_SIZE) { |
1370 | pr_err("Malformed AGF PDU\n"); | |
d646960f SO |
1371 | return; |
1372 | } | |
1373 | ||
098dafcf TE |
1374 | skb_pull(skb, LLCP_HEADER_SIZE); |
1375 | ||
1376 | while (skb->len > LLCP_AGF_PDU_HEADER_SIZE) { | |
1377 | pdu_len = skb->data[0] << 8 | skb->data[1]; | |
1378 | ||
1379 | skb_pull(skb, LLCP_AGF_PDU_HEADER_SIZE); | |
1380 | ||
1381 | if (pdu_len < LLCP_HEADER_SIZE || pdu_len > skb->len) { | |
1382 | pr_err("Malformed AGF PDU\n"); | |
1383 | return; | |
1384 | } | |
1385 | ||
1386 | ptype = nfc_llcp_ptype(skb); | |
1387 | ||
1388 | if (ptype == LLCP_PDU_SYMM || ptype == LLCP_PDU_AGF) | |
1389 | goto next; | |
1390 | ||
1391 | new_skb = nfc_alloc_recv_skb(pdu_len, GFP_KERNEL); | |
1392 | if (new_skb == NULL) { | |
1393 | pr_err("Could not allocate PDU\n"); | |
1394 | return; | |
1395 | } | |
1396 | ||
59ae1d12 | 1397 | skb_put_data(new_skb, skb->data, pdu_len); |
098dafcf TE |
1398 | |
1399 | nfc_llcp_rx_skb(local, new_skb); | |
1400 | ||
1401 | kfree_skb(new_skb); | |
1402 | next: | |
1403 | skb_pull(skb, pdu_len); | |
1404 | } | |
1405 | } | |
1406 | ||
1407 | static void nfc_llcp_rx_skb(struct nfc_llcp_local *local, struct sk_buff *skb) | |
1408 | { | |
1409 | u8 dsap, ssap, ptype; | |
1410 | ||
d646960f SO |
1411 | ptype = nfc_llcp_ptype(skb); |
1412 | dsap = nfc_llcp_dsap(skb); | |
1413 | ssap = nfc_llcp_ssap(skb); | |
1414 | ||
1415 | pr_debug("ptype 0x%x dsap 0x%x ssap 0x%x\n", ptype, dsap, ssap); | |
1416 | ||
4be646ec | 1417 | if (ptype != LLCP_PDU_SYMM) |
806bfe31 TE |
1418 | print_hex_dump_debug("LLCP Rx: ", DUMP_PREFIX_OFFSET, 16, 1, |
1419 | skb->data, skb->len, true); | |
4be646ec | 1420 | |
d646960f SO |
1421 | switch (ptype) { |
1422 | case LLCP_PDU_SYMM: | |
1423 | pr_debug("SYMM\n"); | |
1424 | break; | |
1425 | ||
968272bf SO |
1426 | case LLCP_PDU_UI: |
1427 | pr_debug("UI\n"); | |
1428 | nfc_llcp_recv_ui(local, skb); | |
1429 | break; | |
1430 | ||
d646960f SO |
1431 | case LLCP_PDU_CONNECT: |
1432 | pr_debug("CONNECT\n"); | |
1433 | nfc_llcp_recv_connect(local, skb); | |
1434 | break; | |
1435 | ||
1436 | case LLCP_PDU_DISC: | |
1437 | pr_debug("DISC\n"); | |
1438 | nfc_llcp_recv_disc(local, skb); | |
1439 | break; | |
1440 | ||
1441 | case LLCP_PDU_CC: | |
1442 | pr_debug("CC\n"); | |
1443 | nfc_llcp_recv_cc(local, skb); | |
1444 | break; | |
1445 | ||
5c0560b7 SO |
1446 | case LLCP_PDU_DM: |
1447 | pr_debug("DM\n"); | |
1448 | nfc_llcp_recv_dm(local, skb); | |
1449 | break; | |
1450 | ||
19cfe584 SO |
1451 | case LLCP_PDU_SNL: |
1452 | pr_debug("SNL\n"); | |
1453 | nfc_llcp_recv_snl(local, skb); | |
1454 | break; | |
1455 | ||
d646960f SO |
1456 | case LLCP_PDU_I: |
1457 | case LLCP_PDU_RR: | |
53aef920 | 1458 | case LLCP_PDU_RNR: |
d646960f SO |
1459 | pr_debug("I frame\n"); |
1460 | nfc_llcp_recv_hdlc(local, skb); | |
1461 | break; | |
1462 | ||
098dafcf TE |
1463 | case LLCP_PDU_AGF: |
1464 | pr_debug("AGF frame\n"); | |
1465 | nfc_llcp_recv_agf(local, skb); | |
1466 | break; | |
d646960f | 1467 | } |
098dafcf TE |
1468 | } |
1469 | ||
1470 | static void nfc_llcp_rx_work(struct work_struct *work) | |
1471 | { | |
1472 | struct nfc_llcp_local *local = container_of(work, struct nfc_llcp_local, | |
1473 | rx_work); | |
1474 | struct sk_buff *skb; | |
1475 | ||
1476 | skb = local->rx_pending; | |
1477 | if (skb == NULL) { | |
1478 | pr_debug("No pending SKB\n"); | |
1479 | return; | |
1480 | } | |
1481 | ||
1482 | __net_timestamp(skb); | |
1483 | ||
57be1f3f | 1484 | nfc_llcp_send_to_raw_sock(local, skb, NFC_DIRECTION_RX); |
098dafcf TE |
1485 | |
1486 | nfc_llcp_rx_skb(local, skb); | |
d646960f | 1487 | |
916082b0 | 1488 | schedule_work(&local->tx_work); |
d646960f SO |
1489 | kfree_skb(local->rx_pending); |
1490 | local->rx_pending = NULL; | |
d646960f SO |
1491 | } |
1492 | ||
1727cf93 SO |
1493 | static void __nfc_llcp_recv(struct nfc_llcp_local *local, struct sk_buff *skb) |
1494 | { | |
1495 | local->rx_pending = skb; | |
1496 | del_timer(&local->link_timer); | |
1497 | schedule_work(&local->rx_work); | |
1498 | } | |
1499 | ||
d646960f SO |
1500 | void nfc_llcp_recv(void *data, struct sk_buff *skb, int err) |
1501 | { | |
1502 | struct nfc_llcp_local *local = (struct nfc_llcp_local *) data; | |
1503 | ||
1504 | pr_debug("Received an LLCP PDU\n"); | |
1505 | if (err < 0) { | |
427a2eb1 | 1506 | pr_err("err %d\n", err); |
d646960f SO |
1507 | return; |
1508 | } | |
1509 | ||
1727cf93 | 1510 | __nfc_llcp_recv(local, skb); |
d646960f SO |
1511 | } |
1512 | ||
73167ced SO |
1513 | int nfc_llcp_data_received(struct nfc_dev *dev, struct sk_buff *skb) |
1514 | { | |
1515 | struct nfc_llcp_local *local; | |
1516 | ||
1517 | local = nfc_llcp_find_local(dev); | |
966efbfb JL |
1518 | if (local == NULL) { |
1519 | kfree_skb(skb); | |
73167ced | 1520 | return -ENODEV; |
966efbfb | 1521 | } |
73167ced | 1522 | |
1727cf93 | 1523 | __nfc_llcp_recv(local, skb); |
73167ced SO |
1524 | |
1525 | return 0; | |
1526 | } | |
1527 | ||
d646960f SO |
1528 | void nfc_llcp_mac_is_down(struct nfc_dev *dev) |
1529 | { | |
1530 | struct nfc_llcp_local *local; | |
1531 | ||
1532 | local = nfc_llcp_find_local(dev); | |
1533 | if (local == NULL) | |
1534 | return; | |
1535 | ||
abd18d43 TE |
1536 | local->remote_miu = LLCP_DEFAULT_MIU; |
1537 | local->remote_lto = LLCP_DEFAULT_LTO; | |
1538 | ||
d646960f | 1539 | /* Close and purge all existing sockets */ |
3bbc0ceb | 1540 | nfc_llcp_socket_release(local, true, 0); |
d646960f SO |
1541 | } |
1542 | ||
1543 | void nfc_llcp_mac_is_up(struct nfc_dev *dev, u32 target_idx, | |
1544 | u8 comm_mode, u8 rf_mode) | |
1545 | { | |
1546 | struct nfc_llcp_local *local; | |
1547 | ||
1548 | pr_debug("rf mode %d\n", rf_mode); | |
1549 | ||
1550 | local = nfc_llcp_find_local(dev); | |
1551 | if (local == NULL) | |
1552 | return; | |
1553 | ||
1554 | local->target_idx = target_idx; | |
1555 | local->comm_mode = comm_mode; | |
1556 | local->rf_mode = rf_mode; | |
1557 | ||
1558 | if (rf_mode == NFC_RF_INITIATOR) { | |
1559 | pr_debug("Queueing Tx work\n"); | |
1560 | ||
916082b0 | 1561 | schedule_work(&local->tx_work); |
d646960f SO |
1562 | } else { |
1563 | mod_timer(&local->link_timer, | |
427a2eb1 | 1564 | jiffies + msecs_to_jiffies(local->remote_lto)); |
d646960f SO |
1565 | } |
1566 | } | |
1567 | ||
1568 | int nfc_llcp_register_device(struct nfc_dev *ndev) | |
1569 | { | |
d646960f | 1570 | struct nfc_llcp_local *local; |
d646960f SO |
1571 | |
1572 | local = kzalloc(sizeof(struct nfc_llcp_local), GFP_KERNEL); | |
1573 | if (local == NULL) | |
1574 | return -ENOMEM; | |
1575 | ||
1576 | local->dev = ndev; | |
1577 | INIT_LIST_HEAD(&local->list); | |
c7aa1225 | 1578 | kref_init(&local->ref); |
d646960f | 1579 | mutex_init(&local->sdp_lock); |
4b519bb4 | 1580 | timer_setup(&local->link_timer, nfc_llcp_symm_timer, 0); |
d646960f SO |
1581 | |
1582 | skb_queue_head_init(&local->tx_queue); | |
1583 | INIT_WORK(&local->tx_work, nfc_llcp_tx_work); | |
d646960f SO |
1584 | |
1585 | local->rx_pending = NULL; | |
1586 | INIT_WORK(&local->rx_work, nfc_llcp_rx_work); | |
d646960f SO |
1587 | |
1588 | INIT_WORK(&local->timeout_work, nfc_llcp_timeout_work); | |
d646960f | 1589 | |
fe235b58 SJ |
1590 | rwlock_init(&local->sockets.lock); |
1591 | rwlock_init(&local->connecting_sockets.lock); | |
4463523b | 1592 | rwlock_init(&local->raw_sockets.lock); |
a69f32af | 1593 | |
52feb444 TE |
1594 | local->lto = 150; /* 1500 ms */ |
1595 | local->rw = LLCP_MAX_RW; | |
1596 | local->miux = cpu_to_be16(LLCP_MAX_MIUX); | |
f768b340 | 1597 | local->local_wks = 0x1; /* LLC Link Management */ |
52feb444 | 1598 | |
d646960f SO |
1599 | nfc_llcp_build_gb(local); |
1600 | ||
1601 | local->remote_miu = LLCP_DEFAULT_MIU; | |
1602 | local->remote_lto = LLCP_DEFAULT_LTO; | |
d646960f | 1603 | |
d9b8d8e1 TE |
1604 | mutex_init(&local->sdreq_lock); |
1605 | INIT_HLIST_HEAD(&local->pending_sdreqs); | |
4b519bb4 | 1606 | timer_setup(&local->sdreq_timer, nfc_llcp_sdreq_timer, 0); |
40213fa8 | 1607 | INIT_WORK(&local->sdreq_timeout_work, nfc_llcp_sdreq_timeout_work); |
d9b8d8e1 | 1608 | |
16a78e9f | 1609 | list_add(&local->list, &llcp_devices); |
d646960f | 1610 | |
d646960f SO |
1611 | return 0; |
1612 | } | |
1613 | ||
1614 | void nfc_llcp_unregister_device(struct nfc_dev *dev) | |
1615 | { | |
1616 | struct nfc_llcp_local *local = nfc_llcp_find_local(dev); | |
1617 | ||
1618 | if (local == NULL) { | |
1619 | pr_debug("No such device\n"); | |
1620 | return; | |
1621 | } | |
1622 | ||
c470e319 | 1623 | local_cleanup(local); |
3536da06 | 1624 | |
c7aa1225 | 1625 | nfc_llcp_local_put(local); |
d646960f SO |
1626 | } |
1627 | ||
1628 | int __init nfc_llcp_init(void) | |
1629 | { | |
d646960f SO |
1630 | return nfc_llcp_sock_init(); |
1631 | } | |
1632 | ||
1633 | void nfc_llcp_exit(void) | |
1634 | { | |
1635 | nfc_llcp_sock_exit(); | |
1636 | } |