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Linux 4.11-rc6
[linux/fpc-iii.git] / net / bluetooth / bnep / core.c
blobfbf251fef70fe89d61a3533bbb7a6b3e18429c01
1 /*
2 BNEP implementation for Linux Bluetooth stack (BlueZ).
3 Copyright (C) 2001-2002 Inventel Systemes
4 Written 2001-2002 by
5 Clément Moreau <clement.moreau@inventel.fr>
6 David Libault <david.libault@inventel.fr>
7
8 Copyright (C) 2002 Maxim Krasnyansky <maxk@qualcomm.com>
9
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License version 2 as
12 published by the Free Software Foundation;
13
14 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
15 OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
17 IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
18 CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
19 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
20 ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
21 OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
22
23 ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
24 COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
25 SOFTWARE IS DISCLAIMED.
26 */
27
28 #include <linux/module.h>
29 #include <linux/kthread.h>
30 #include <linux/file.h>
31 #include <linux/etherdevice.h>
32 #include <asm/unaligned.h>
33
34 #include <net/bluetooth/bluetooth.h>
35 #include <net/bluetooth/l2cap.h>
36 #include <net/bluetooth/hci_core.h>
37
38 #include "bnep.h"
39
40 #define VERSION "1.3"
41
42 static bool compress_src = true;
43 static bool compress_dst = true;
44
45 static LIST_HEAD(bnep_session_list);
46 static DECLARE_RWSEM(bnep_session_sem);
47
48 static struct bnep_session *__bnep_get_session(u8 *dst)
49 {
50 struct bnep_session *s;
51
52 BT_DBG("");
53
54 list_for_each_entry(s, &bnep_session_list, list)
55 if (ether_addr_equal(dst, s->eh.h_source))
56 return s;
57
58 return NULL;
59 }
60
61 static void __bnep_link_session(struct bnep_session *s)
62 {
63 list_add(&s->list, &bnep_session_list);
64 }
65
66 static void __bnep_unlink_session(struct bnep_session *s)
67 {
68 list_del(&s->list);
69 }
70
71 static int bnep_send(struct bnep_session *s, void *data, size_t len)
72 {
73 struct socket *sock = s->sock;
74 struct kvec iv = { data, len };
75
76 return kernel_sendmsg(sock, &s->msg, &iv, 1, len);
77 }
78
79 static int bnep_send_rsp(struct bnep_session *s, u8 ctrl, u16 resp)
80 {
81 struct bnep_control_rsp rsp;
82 rsp.type = BNEP_CONTROL;
83 rsp.ctrl = ctrl;
84 rsp.resp = htons(resp);
85 return bnep_send(s, &rsp, sizeof(rsp));
86 }
87
88 #ifdef CONFIG_BT_BNEP_PROTO_FILTER
89 static inline void bnep_set_default_proto_filter(struct bnep_session *s)
90 {
91 /* (IPv4, ARP) */
92 s->proto_filter[0].start = ETH_P_IP;
93 s->proto_filter[0].end = ETH_P_ARP;
94 /* (RARP, AppleTalk) */
95 s->proto_filter[1].start = ETH_P_RARP;
96 s->proto_filter[1].end = ETH_P_AARP;
97 /* (IPX, IPv6) */
98 s->proto_filter[2].start = ETH_P_IPX;
99 s->proto_filter[2].end = ETH_P_IPV6;
100 }
101 #endif
102
103 static int bnep_ctrl_set_netfilter(struct bnep_session *s, __be16 *data, int len)
104 {
105 int n;
106
107 if (len < 2)
108 return -EILSEQ;
109
110 n = get_unaligned_be16(data);
111 data++;
112 len -= 2;
113
114 if (len < n)
115 return -EILSEQ;
116
117 BT_DBG("filter len %d", n);
118
119 #ifdef CONFIG_BT_BNEP_PROTO_FILTER
120 n /= 4;
121 if (n <= BNEP_MAX_PROTO_FILTERS) {
122 struct bnep_proto_filter *f = s->proto_filter;
123 int i;
124
125 for (i = 0; i < n; i++) {
126 f[i].start = get_unaligned_be16(data++);
127 f[i].end = get_unaligned_be16(data++);
128
129 BT_DBG("proto filter start %d end %d",
130 f[i].start, f[i].end);
131 }
132
133 if (i < BNEP_MAX_PROTO_FILTERS)
134 memset(f + i, 0, sizeof(*f));
135
136 if (n == 0)
137 bnep_set_default_proto_filter(s);
138
139 bnep_send_rsp(s, BNEP_FILTER_NET_TYPE_RSP, BNEP_SUCCESS);
140 } else {
141 bnep_send_rsp(s, BNEP_FILTER_NET_TYPE_RSP, BNEP_FILTER_LIMIT_REACHED);
142 }
143 #else
144 bnep_send_rsp(s, BNEP_FILTER_NET_TYPE_RSP, BNEP_FILTER_UNSUPPORTED_REQ);
145 #endif
146 return 0;
147 }
148
149 static int bnep_ctrl_set_mcfilter(struct bnep_session *s, u8 *data, int len)
150 {
151 int n;
152
153 if (len < 2)
154 return -EILSEQ;
155
156 n = get_unaligned_be16(data);
157 data += 2;
158 len -= 2;
159
160 if (len < n)
161 return -EILSEQ;
162
163 BT_DBG("filter len %d", n);
164
165 #ifdef CONFIG_BT_BNEP_MC_FILTER
166 n /= (ETH_ALEN * 2);
167
168 if (n > 0) {
169 int i;
170
171 s->mc_filter = 0;
172
173 /* Always send broadcast */
174 set_bit(bnep_mc_hash(s->dev->broadcast), (ulong *) &s->mc_filter);
175
176 /* Add address ranges to the multicast hash */
177 for (; n > 0; n--) {
178 u8 a1[6], *a2;
179
180 memcpy(a1, data, ETH_ALEN);
181 data += ETH_ALEN;
182 a2 = data;
183 data += ETH_ALEN;
184
185 BT_DBG("mc filter %pMR -> %pMR", a1, a2);
186
187 /* Iterate from a1 to a2 */
188 set_bit(bnep_mc_hash(a1), (ulong *) &s->mc_filter);
189 while (memcmp(a1, a2, 6) < 0 && s->mc_filter != ~0LL) {
190 /* Increment a1 */
191 i = 5;
192 while (i >= 0 && ++a1[i--] == 0)
193 ;
194
195 set_bit(bnep_mc_hash(a1), (ulong *) &s->mc_filter);
196 }
197 }
198 }
199
200 BT_DBG("mc filter hash 0x%llx", s->mc_filter);
201
202 bnep_send_rsp(s, BNEP_FILTER_MULTI_ADDR_RSP, BNEP_SUCCESS);
203 #else
204 bnep_send_rsp(s, BNEP_FILTER_MULTI_ADDR_RSP, BNEP_FILTER_UNSUPPORTED_REQ);
205 #endif
206 return 0;
207 }
208
209 static int bnep_rx_control(struct bnep_session *s, void *data, int len)
210 {
211 u8 cmd = *(u8 *)data;
212 int err = 0;
213
214 data++;
215 len--;
216
217 switch (cmd) {
218 case BNEP_CMD_NOT_UNDERSTOOD:
219 case BNEP_SETUP_CONN_RSP:
220 case BNEP_FILTER_NET_TYPE_RSP:
221 case BNEP_FILTER_MULTI_ADDR_RSP:
222 /* Ignore these for now */
223 break;
224
225 case BNEP_FILTER_NET_TYPE_SET:
226 err = bnep_ctrl_set_netfilter(s, data, len);
227 break;
228
229 case BNEP_FILTER_MULTI_ADDR_SET:
230 err = bnep_ctrl_set_mcfilter(s, data, len);
231 break;
232
233 case BNEP_SETUP_CONN_REQ:
234 /* Successful response should be sent only once */
235 if (test_bit(BNEP_SETUP_RESPONSE, &s->flags) &&
236 !test_and_set_bit(BNEP_SETUP_RSP_SENT, &s->flags))
237 err = bnep_send_rsp(s, BNEP_SETUP_CONN_RSP,
238 BNEP_SUCCESS);
239 else
240 err = bnep_send_rsp(s, BNEP_SETUP_CONN_RSP,
241 BNEP_CONN_NOT_ALLOWED);
242 break;
243
244 default: {
245 u8 pkt[3];
246 pkt[0] = BNEP_CONTROL;
247 pkt[1] = BNEP_CMD_NOT_UNDERSTOOD;
248 pkt[2] = cmd;
249 err = bnep_send(s, pkt, sizeof(pkt));
250 }
251 break;
252 }
253
254 return err;
255 }
256
257 static int bnep_rx_extension(struct bnep_session *s, struct sk_buff *skb)
258 {
259 struct bnep_ext_hdr *h;
260 int err = 0;
261
262 do {
263 h = (void *) skb->data;
264 if (!skb_pull(skb, sizeof(*h))) {
265 err = -EILSEQ;
266 break;
267 }
268
269 BT_DBG("type 0x%x len %d", h->type, h->len);
270
271 switch (h->type & BNEP_TYPE_MASK) {
272 case BNEP_EXT_CONTROL:
273 bnep_rx_control(s, skb->data, skb->len);
274 break;
275
276 default:
277 /* Unknown extension, skip it. */
278 break;
279 }
280
281 if (!skb_pull(skb, h->len)) {
282 err = -EILSEQ;
283 break;
284 }
285 } while (!err && (h->type & BNEP_EXT_HEADER));
286
287 return err;
288 }
289
290 static u8 __bnep_rx_hlen[] = {
291 ETH_HLEN, /* BNEP_GENERAL */
292 0, /* BNEP_CONTROL */
293 2, /* BNEP_COMPRESSED */
294 ETH_ALEN + 2, /* BNEP_COMPRESSED_SRC_ONLY */
295 ETH_ALEN + 2 /* BNEP_COMPRESSED_DST_ONLY */
296 };
297
298 static int bnep_rx_frame(struct bnep_session *s, struct sk_buff *skb)
299 {
300 struct net_device *dev = s->dev;
301 struct sk_buff *nskb;
302 u8 type, ctrl_type;
303
304 dev->stats.rx_bytes += skb->len;
305
306 type = *(u8 *) skb->data;
307 skb_pull(skb, 1);
308 ctrl_type = *(u8 *)skb->data;
309
310 if ((type & BNEP_TYPE_MASK) >= sizeof(__bnep_rx_hlen))
311 goto badframe;
312
313 if ((type & BNEP_TYPE_MASK) == BNEP_CONTROL) {
314 if (bnep_rx_control(s, skb->data, skb->len) < 0) {
315 dev->stats.tx_errors++;
316 kfree_skb(skb);
317 return 0;
318 }
319
320 if (!(type & BNEP_EXT_HEADER)) {
321 kfree_skb(skb);
322 return 0;
323 }
324
325 /* Verify and pull ctrl message since it's already processed */
326 switch (ctrl_type) {
327 case BNEP_SETUP_CONN_REQ:
328 /* Pull: ctrl type (1 b), len (1 b), data (len bytes) */
329 if (!skb_pull(skb, 2 + *(u8 *)(skb->data + 1) * 2))
330 goto badframe;
331 break;
332 case BNEP_FILTER_MULTI_ADDR_SET:
333 case BNEP_FILTER_NET_TYPE_SET:
334 /* Pull: ctrl type (1 b), len (2 b), data (len bytes) */
335 if (!skb_pull(skb, 3 + *(u16 *)(skb->data + 1) * 2))
336 goto badframe;
337 break;
338 default:
339 kfree_skb(skb);
340 return 0;
341 }
342 } else {
343 skb_reset_mac_header(skb);
344
345 /* Verify and pull out header */
346 if (!skb_pull(skb, __bnep_rx_hlen[type & BNEP_TYPE_MASK]))
347 goto badframe;
348
349 s->eh.h_proto = get_unaligned((__be16 *) (skb->data - 2));
350 }
351
352 if (type & BNEP_EXT_HEADER) {
353 if (bnep_rx_extension(s, skb) < 0)
354 goto badframe;
355 }
356
357 /* Strip 802.1p header */
358 if (ntohs(s->eh.h_proto) == ETH_P_8021Q) {
359 if (!skb_pull(skb, 4))
360 goto badframe;
361 s->eh.h_proto = get_unaligned((__be16 *) (skb->data - 2));
362 }
363
364 /* We have to alloc new skb and copy data here :(. Because original skb
365 * may not be modified and because of the alignment requirements. */
366 nskb = alloc_skb(2 + ETH_HLEN + skb->len, GFP_KERNEL);
367 if (!nskb) {
368 dev->stats.rx_dropped++;
369 kfree_skb(skb);
370 return -ENOMEM;
371 }
372 skb_reserve(nskb, 2);
373
374 /* Decompress header and construct ether frame */
375 switch (type & BNEP_TYPE_MASK) {
376 case BNEP_COMPRESSED:
377 memcpy(__skb_put(nskb, ETH_HLEN), &s->eh, ETH_HLEN);
378 break;
379
380 case BNEP_COMPRESSED_SRC_ONLY:
381 memcpy(__skb_put(nskb, ETH_ALEN), s->eh.h_dest, ETH_ALEN);
382 memcpy(__skb_put(nskb, ETH_ALEN), skb_mac_header(skb), ETH_ALEN);
383 put_unaligned(s->eh.h_proto, (__be16 *) __skb_put(nskb, 2));
384 break;
385
386 case BNEP_COMPRESSED_DST_ONLY:
387 memcpy(__skb_put(nskb, ETH_ALEN), skb_mac_header(skb),
388 ETH_ALEN);
389 memcpy(__skb_put(nskb, ETH_ALEN + 2), s->eh.h_source,
390 ETH_ALEN + 2);
391 break;
392
393 case BNEP_GENERAL:
394 memcpy(__skb_put(nskb, ETH_ALEN * 2), skb_mac_header(skb),
395 ETH_ALEN * 2);
396 put_unaligned(s->eh.h_proto, (__be16 *) __skb_put(nskb, 2));
397 break;
398 }
399
400 skb_copy_from_linear_data(skb, __skb_put(nskb, skb->len), skb->len);
401 kfree_skb(skb);
402
403 dev->stats.rx_packets++;
404 nskb->ip_summed = CHECKSUM_NONE;
405 nskb->protocol = eth_type_trans(nskb, dev);
406 netif_rx_ni(nskb);
407 return 0;
408
409 badframe:
410 dev->stats.rx_errors++;
411 kfree_skb(skb);
412 return 0;
413 }
414
415 static u8 __bnep_tx_types[] = {
416 BNEP_GENERAL,
417 BNEP_COMPRESSED_SRC_ONLY,
418 BNEP_COMPRESSED_DST_ONLY,
419 BNEP_COMPRESSED
420 };
421
422 static int bnep_tx_frame(struct bnep_session *s, struct sk_buff *skb)
423 {
424 struct ethhdr *eh = (void *) skb->data;
425 struct socket *sock = s->sock;
426 struct kvec iv[3];
427 int len = 0, il = 0;
428 u8 type = 0;
429
430 BT_DBG("skb %p dev %p type %d", skb, skb->dev, skb->pkt_type);
431
432 if (!skb->dev) {
433 /* Control frame sent by us */
434 goto send;
435 }
436
437 iv[il++] = (struct kvec) { &type, 1 };
438 len++;
439
440 if (compress_src && ether_addr_equal(eh->h_dest, s->eh.h_source))
441 type |= 0x01;
442
443 if (compress_dst && ether_addr_equal(eh->h_source, s->eh.h_dest))
444 type |= 0x02;
445
446 if (type)
447 skb_pull(skb, ETH_ALEN * 2);
448
449 type = __bnep_tx_types[type];
450 switch (type) {
451 case BNEP_COMPRESSED_SRC_ONLY:
452 iv[il++] = (struct kvec) { eh->h_source, ETH_ALEN };
453 len += ETH_ALEN;
454 break;
455
456 case BNEP_COMPRESSED_DST_ONLY:
457 iv[il++] = (struct kvec) { eh->h_dest, ETH_ALEN };
458 len += ETH_ALEN;
459 break;
460 }
461
462 send:
463 iv[il++] = (struct kvec) { skb->data, skb->len };
464 len += skb->len;
465
466 /* FIXME: linearize skb */
467 {
468 len = kernel_sendmsg(sock, &s->msg, iv, il, len);
469 }
470 kfree_skb(skb);
471
472 if (len > 0) {
473 s->dev->stats.tx_bytes += len;
474 s->dev->stats.tx_packets++;
475 return 0;
476 }
477
478 return len;
479 }
480
481 static int bnep_session(void *arg)
482 {
483 struct bnep_session *s = arg;
484 struct net_device *dev = s->dev;
485 struct sock *sk = s->sock->sk;
486 struct sk_buff *skb;
487 wait_queue_t wait;
488
489 BT_DBG("");
490
491 set_user_nice(current, -15);
492
493 init_waitqueue_entry(&wait, current);
494 add_wait_queue(sk_sleep(sk), &wait);
495 while (1) {
496 set_current_state(TASK_INTERRUPTIBLE);
497
498 if (atomic_read(&s->terminate))
499 break;
500 /* RX */
501 while ((skb = skb_dequeue(&sk->sk_receive_queue))) {
502 skb_orphan(skb);
503 if (!skb_linearize(skb))
504 bnep_rx_frame(s, skb);
505 else
506 kfree_skb(skb);
507 }
508
509 if (sk->sk_state != BT_CONNECTED)
510 break;
511
512 /* TX */
513 while ((skb = skb_dequeue(&sk->sk_write_queue)))
514 if (bnep_tx_frame(s, skb))
515 break;
516 netif_wake_queue(dev);
517
518 schedule();
519 }
520 __set_current_state(TASK_RUNNING);
521 remove_wait_queue(sk_sleep(sk), &wait);
522
523 /* Cleanup session */
524 down_write(&bnep_session_sem);
525
526 /* Delete network device */
527 unregister_netdev(dev);
528
529 /* Wakeup user-space polling for socket errors */
530 s->sock->sk->sk_err = EUNATCH;
531
532 wake_up_interruptible(sk_sleep(s->sock->sk));
533
534 /* Release the socket */
535 fput(s->sock->file);
536
537 __bnep_unlink_session(s);
538
539 up_write(&bnep_session_sem);
540 free_netdev(dev);
541 module_put_and_exit(0);
542 return 0;
543 }
544
545 static struct device *bnep_get_device(struct bnep_session *session)
546 {
547 struct l2cap_conn *conn = l2cap_pi(session->sock->sk)->chan->conn;
548
549 if (!conn || !conn->hcon)
550 return NULL;
551
552 return &conn->hcon->dev;
553 }
554
555 static struct device_type bnep_type = {
556 .name = "bluetooth",
557 };
558
559 int bnep_add_connection(struct bnep_connadd_req *req, struct socket *sock)
560 {
561 u32 valid_flags = BIT(BNEP_SETUP_RESPONSE);
562 struct net_device *dev;
563 struct bnep_session *s, *ss;
564 u8 dst[ETH_ALEN], src[ETH_ALEN];
565 int err;
566
567 BT_DBG("");
568
569 if (!l2cap_is_socket(sock))
570 return -EBADFD;
571
572 if (req->flags & ~valid_flags)
573 return -EINVAL;
574
575 baswap((void *) dst, &l2cap_pi(sock->sk)->chan->dst);
576 baswap((void *) src, &l2cap_pi(sock->sk)->chan->src);
577
578 /* session struct allocated as private part of net_device */
579 dev = alloc_netdev(sizeof(struct bnep_session),
580 (*req->device) ? req->device : "bnep%d",
581 NET_NAME_UNKNOWN,
582 bnep_net_setup);
583 if (!dev)
584 return -ENOMEM;
585
586 down_write(&bnep_session_sem);
587
588 ss = __bnep_get_session(dst);
589 if (ss && ss->state == BT_CONNECTED) {
590 err = -EEXIST;
591 goto failed;
592 }
593
594 s = netdev_priv(dev);
595
596 /* This is rx header therefore addresses are swapped.
597 * ie. eh.h_dest is our local address. */
598 memcpy(s->eh.h_dest, &src, ETH_ALEN);
599 memcpy(s->eh.h_source, &dst, ETH_ALEN);
600 memcpy(dev->dev_addr, s->eh.h_dest, ETH_ALEN);
601
602 s->dev = dev;
603 s->sock = sock;
604 s->role = req->role;
605 s->state = BT_CONNECTED;
606 s->flags = req->flags;
607
608 s->msg.msg_flags = MSG_NOSIGNAL;
609
610 #ifdef CONFIG_BT_BNEP_MC_FILTER
611 /* Set default mc filter to not filter out any mc addresses
612 * as defined in the BNEP specification (revision 0.95a)
613 * http://grouper.ieee.org/groups/802/15/Bluetooth/BNEP.pdf
614 */
615 s->mc_filter = ~0LL;
616 #endif
617
618 #ifdef CONFIG_BT_BNEP_PROTO_FILTER
619 /* Set default protocol filter */
620 bnep_set_default_proto_filter(s);
621 #endif
622
623 SET_NETDEV_DEV(dev, bnep_get_device(s));
624 SET_NETDEV_DEVTYPE(dev, &bnep_type);
625
626 err = register_netdev(dev);
627 if (err)
628 goto failed;
629
630 __bnep_link_session(s);
631
632 __module_get(THIS_MODULE);
633 s->task = kthread_run(bnep_session, s, "kbnepd %s", dev->name);
634 if (IS_ERR(s->task)) {
635 /* Session thread start failed, gotta cleanup. */
636 module_put(THIS_MODULE);
637 unregister_netdev(dev);
638 __bnep_unlink_session(s);
639 err = PTR_ERR(s->task);
640 goto failed;
641 }
642
643 up_write(&bnep_session_sem);
644 strcpy(req->device, dev->name);
645 return 0;
646
647 failed:
648 up_write(&bnep_session_sem);
649 free_netdev(dev);
650 return err;
651 }
652
653 int bnep_del_connection(struct bnep_conndel_req *req)
654 {
655 u32 valid_flags = 0;
656 struct bnep_session *s;
657 int err = 0;
658
659 BT_DBG("");
660
661 if (req->flags & ~valid_flags)
662 return -EINVAL;
663
664 down_read(&bnep_session_sem);
665
666 s = __bnep_get_session(req->dst);
667 if (s) {
668 atomic_inc(&s->terminate);
669 wake_up_process(s->task);
670 } else
671 err = -ENOENT;
672
673 up_read(&bnep_session_sem);
674 return err;
675 }
676
677 static void __bnep_copy_ci(struct bnep_conninfo *ci, struct bnep_session *s)
678 {
679 u32 valid_flags = BIT(BNEP_SETUP_RESPONSE);
680
681 memset(ci, 0, sizeof(*ci));
682 memcpy(ci->dst, s->eh.h_source, ETH_ALEN);
683 strcpy(ci->device, s->dev->name);
684 ci->flags = s->flags & valid_flags;
685 ci->state = s->state;
686 ci->role = s->role;
687 }
688
689 int bnep_get_connlist(struct bnep_connlist_req *req)
690 {
691 struct bnep_session *s;
692 int err = 0, n = 0;
693
694 down_read(&bnep_session_sem);
695
696 list_for_each_entry(s, &bnep_session_list, list) {
697 struct bnep_conninfo ci;
698
699 __bnep_copy_ci(&ci, s);
700
701 if (copy_to_user(req->ci, &ci, sizeof(ci))) {
702 err = -EFAULT;
703 break;
704 }
705
706 if (++n >= req->cnum)
707 break;
708
709 req->ci++;
710 }
711 req->cnum = n;
712
713 up_read(&bnep_session_sem);
714 return err;
715 }
716
717 int bnep_get_conninfo(struct bnep_conninfo *ci)
718 {
719 struct bnep_session *s;
720 int err = 0;
721
722 down_read(&bnep_session_sem);
723
724 s = __bnep_get_session(ci->dst);
725 if (s)
726 __bnep_copy_ci(ci, s);
727 else
728 err = -ENOENT;
729
730 up_read(&bnep_session_sem);
731 return err;
732 }
733
734 static int __init bnep_init(void)
735 {
736 char flt[50] = "";
737
738 #ifdef CONFIG_BT_BNEP_PROTO_FILTER
739 strcat(flt, "protocol ");
740 #endif
741
742 #ifdef CONFIG_BT_BNEP_MC_FILTER
743 strcat(flt, "multicast");
744 #endif
745
746 BT_INFO("BNEP (Ethernet Emulation) ver %s", VERSION);
747 if (flt[0])
748 BT_INFO("BNEP filters: %s", flt);
749
750 bnep_sock_init();
751 return 0;
752 }
753
754 static void __exit bnep_exit(void)
755 {
756 bnep_sock_cleanup();
757 }
758
759 module_init(bnep_init);
760 module_exit(bnep_exit);
761
762 module_param(compress_src, bool, 0644);
763 MODULE_PARM_DESC(compress_src, "Compress sources headers");
764
765 module_param(compress_dst, bool, 0644);
766 MODULE_PARM_DESC(compress_dst, "Compress destination headers");
767
768 MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
769 MODULE_DESCRIPTION("Bluetooth BNEP ver " VERSION);
770 MODULE_VERSION(VERSION);
771 MODULE_LICENSE("GPL");
772 MODULE_ALIAS("bt-proto-4");
Linux with added FPC-III support