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