xref: /openbmc/linux/net/bluetooth/bnep/core.c (revision 39b6f3aa) 
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/hci_core.h>
36 
37 #include "bnep.h"
38 
39 #define VERSION "1.3"
40 
41 static bool compress_src = true;
42 static bool compress_dst = true;
43 
44 static LIST_HEAD(bnep_session_list);
45 static DECLARE_RWSEM(bnep_session_sem);
46 
47 static struct bnep_session *__bnep_get_session(u8 *dst)
48 {
49 	struct bnep_session *s;
50 
51 	BT_DBG("");
52 
53 	list_for_each_entry(s, &bnep_session_list, list)
54 		if (ether_addr_equal(dst, s->eh.h_source))
55 			return s;
56 
57 	return NULL;
58 }
59 
60 static void __bnep_link_session(struct bnep_session *s)
61 {
62 	list_add(&s->list, &bnep_session_list);
63 }
64 
65 static void __bnep_unlink_session(struct bnep_session *s)
66 {
67 	list_del(&s->list);
68 }
69 
70 static int bnep_send(struct bnep_session *s, void *data, size_t len)
71 {
72 	struct socket *sock = s->sock;
73 	struct kvec iv = { data, len };
74 
75 	return kernel_sendmsg(sock, &s->msg, &iv, 1, len);
76 }
77 
78 static int bnep_send_rsp(struct bnep_session *s, u8 ctrl, u16 resp)
79 {
80 	struct bnep_control_rsp rsp;
81 	rsp.type = BNEP_CONTROL;
82 	rsp.ctrl = ctrl;
83 	rsp.resp = htons(resp);
84 	return bnep_send(s, &rsp, sizeof(rsp));
85 }
86 
87 #ifdef CONFIG_BT_BNEP_PROTO_FILTER
88 static inline void bnep_set_default_proto_filter(struct bnep_session *s)
89 {
90 	/* (IPv4, ARP)  */
91 	s->proto_filter[0].start = ETH_P_IP;
92 	s->proto_filter[0].end   = ETH_P_ARP;
93 	/* (RARP, AppleTalk) */
94 	s->proto_filter[1].start = ETH_P_RARP;
95 	s->proto_filter[1].end   = ETH_P_AARP;
96 	/* (IPX, IPv6) */
97 	s->proto_filter[2].start = ETH_P_IPX;
98 	s->proto_filter[2].end   = ETH_P_IPV6;
99 }
100 #endif
101 
102 static int bnep_ctrl_set_netfilter(struct bnep_session *s, __be16 *data, int len)
103 {
104 	int n;
105 
106 	if (len < 2)
107 		return -EILSEQ;
108 
109 	n = get_unaligned_be16(data);
110 	data++;
111 	len -= 2;
112 
113 	if (len < n)
114 		return -EILSEQ;
115 
116 	BT_DBG("filter len %d", n);
117 
118 #ifdef CONFIG_BT_BNEP_PROTO_FILTER
119 	n /= 4;
120 	if (n <= BNEP_MAX_PROTO_FILTERS) {
121 		struct bnep_proto_filter *f = s->proto_filter;
122 		int i;
123 
124 		for (i = 0; i < n; i++) {
125 			f[i].start = get_unaligned_be16(data++);
126 			f[i].end   = get_unaligned_be16(data++);
127 
128 			BT_DBG("proto filter start %d end %d",
129 				f[i].start, f[i].end);
130 		}
131 
132 		if (i < BNEP_MAX_PROTO_FILTERS)
133 			memset(f + i, 0, sizeof(*f));
134 
135 		if (n == 0)
136 			bnep_set_default_proto_filter(s);
137 
138 		bnep_send_rsp(s, BNEP_FILTER_NET_TYPE_RSP, BNEP_SUCCESS);
139 	} else {
140 		bnep_send_rsp(s, BNEP_FILTER_NET_TYPE_RSP, BNEP_FILTER_LIMIT_REACHED);
141 	}
142 #else
143 	bnep_send_rsp(s, BNEP_FILTER_NET_TYPE_RSP, BNEP_FILTER_UNSUPPORTED_REQ);
144 #endif
145 	return 0;
146 }
147 
148 static int bnep_ctrl_set_mcfilter(struct bnep_session *s, u8 *data, int len)
149 {
150 	int n;
151 
152 	if (len < 2)
153 		return -EILSEQ;
154 
155 	n = get_unaligned_be16(data);
156 	data += 2;
157 	len -= 2;
158 
159 	if (len < n)
160 		return -EILSEQ;
161 
162 	BT_DBG("filter len %d", n);
163 
164 #ifdef CONFIG_BT_BNEP_MC_FILTER
165 	n /= (ETH_ALEN * 2);
166 
167 	if (n > 0) {
168 		int i;
169 
170 		s->mc_filter = 0;
171 
172 		/* Always send broadcast */
173 		set_bit(bnep_mc_hash(s->dev->broadcast), (ulong *) &s->mc_filter);
174 
175 		/* Add address ranges to the multicast hash */
176 		for (; n > 0; n--) {
177 			u8 a1[6], *a2;
178 
179 			memcpy(a1, data, ETH_ALEN);
180 			data += ETH_ALEN;
181 			a2 = data;
182 			data += ETH_ALEN;
183 
184 			BT_DBG("mc filter %pMR -> %pMR", a1, a2);
185 
186 			/* Iterate from a1 to a2 */
187 			set_bit(bnep_mc_hash(a1), (ulong *) &s->mc_filter);
188 			while (memcmp(a1, a2, 6) < 0 && s->mc_filter != ~0LL) {
189 				/* Increment a1 */
190 				i = 5;
191 				while (i >= 0 && ++a1[i--] == 0)
192 					;
193 
194 				set_bit(bnep_mc_hash(a1), (ulong *) &s->mc_filter);
195 			}
196 		}
197 	}
198 
199 	BT_DBG("mc filter hash 0x%llx", s->mc_filter);
200 
201 	bnep_send_rsp(s, BNEP_FILTER_MULTI_ADDR_RSP, BNEP_SUCCESS);
202 #else
203 	bnep_send_rsp(s, BNEP_FILTER_MULTI_ADDR_RSP, BNEP_FILTER_UNSUPPORTED_REQ);
204 #endif
205 	return 0;
206 }
207 
208 static int bnep_rx_control(struct bnep_session *s, void *data, int len)
209 {
210 	u8  cmd = *(u8 *)data;
211 	int err = 0;
212 
213 	data++;
214 	len--;
215 
216 	switch (cmd) {
217 	case BNEP_CMD_NOT_UNDERSTOOD:
218 	case BNEP_SETUP_CONN_RSP:
219 	case BNEP_FILTER_NET_TYPE_RSP:
220 	case BNEP_FILTER_MULTI_ADDR_RSP:
221 		/* Ignore these for now */
222 		break;
223 
224 	case BNEP_FILTER_NET_TYPE_SET:
225 		err = bnep_ctrl_set_netfilter(s, data, len);
226 		break;
227 
228 	case BNEP_FILTER_MULTI_ADDR_SET:
229 		err = bnep_ctrl_set_mcfilter(s, data, len);
230 		break;
231 
232 	case BNEP_SETUP_CONN_REQ:
233 		err = bnep_send_rsp(s, BNEP_SETUP_CONN_RSP, BNEP_CONN_NOT_ALLOWED);
234 		break;
235 
236 	default: {
237 			u8 pkt[3];
238 			pkt[0] = BNEP_CONTROL;
239 			pkt[1] = BNEP_CMD_NOT_UNDERSTOOD;
240 			pkt[2] = cmd;
241 			bnep_send(s, pkt, sizeof(pkt));
242 		}
243 		break;
244 	}
245 
246 	return err;
247 }
248 
249 static int bnep_rx_extension(struct bnep_session *s, struct sk_buff *skb)
250 {
251 	struct bnep_ext_hdr *h;
252 	int err = 0;
253 
254 	do {
255 		h = (void *) skb->data;
256 		if (!skb_pull(skb, sizeof(*h))) {
257 			err = -EILSEQ;
258 			break;
259 		}
260 
261 		BT_DBG("type 0x%x len %d", h->type, h->len);
262 
263 		switch (h->type & BNEP_TYPE_MASK) {
264 		case BNEP_EXT_CONTROL:
265 			bnep_rx_control(s, skb->data, skb->len);
266 			break;
267 
268 		default:
269 			/* Unknown extension, skip it. */
270 			break;
271 		}
272 
273 		if (!skb_pull(skb, h->len)) {
274 			err = -EILSEQ;
275 			break;
276 		}
277 	} while (!err && (h->type & BNEP_EXT_HEADER));
278 
279 	return err;
280 }
281 
282 static u8 __bnep_rx_hlen[] = {
283 	ETH_HLEN,     /* BNEP_GENERAL */
284 	0,            /* BNEP_CONTROL */
285 	2,            /* BNEP_COMPRESSED */
286 	ETH_ALEN + 2, /* BNEP_COMPRESSED_SRC_ONLY */
287 	ETH_ALEN + 2  /* BNEP_COMPRESSED_DST_ONLY */
288 };
289 
290 static int bnep_rx_frame(struct bnep_session *s, struct sk_buff *skb)
291 {
292 	struct net_device *dev = s->dev;
293 	struct sk_buff *nskb;
294 	u8 type;
295 
296 	dev->stats.rx_bytes += skb->len;
297 
298 	type = *(u8 *) skb->data;
299 	skb_pull(skb, 1);
300 
301 	if ((type & BNEP_TYPE_MASK) >= sizeof(__bnep_rx_hlen))
302 		goto badframe;
303 
304 	if ((type & BNEP_TYPE_MASK) == BNEP_CONTROL) {
305 		bnep_rx_control(s, skb->data, skb->len);
306 		kfree_skb(skb);
307 		return 0;
308 	}
309 
310 	skb_reset_mac_header(skb);
311 
312 	/* Verify and pull out header */
313 	if (!skb_pull(skb, __bnep_rx_hlen[type & BNEP_TYPE_MASK]))
314 		goto badframe;
315 
316 	s->eh.h_proto = get_unaligned((__be16 *) (skb->data - 2));
317 
318 	if (type & BNEP_EXT_HEADER) {
319 		if (bnep_rx_extension(s, skb) < 0)
320 			goto badframe;
321 	}
322 
323 	/* Strip 802.1p header */
324 	if (ntohs(s->eh.h_proto) == ETH_P_8021Q) {
325 		if (!skb_pull(skb, 4))
326 			goto badframe;
327 		s->eh.h_proto = get_unaligned((__be16 *) (skb->data - 2));
328 	}
329 
330 	/* We have to alloc new skb and copy data here :(. Because original skb
331 	 * may not be modified and because of the alignment requirements. */
332 	nskb = alloc_skb(2 + ETH_HLEN + skb->len, GFP_KERNEL);
333 	if (!nskb) {
334 		dev->stats.rx_dropped++;
335 		kfree_skb(skb);
336 		return -ENOMEM;
337 	}
338 	skb_reserve(nskb, 2);
339 
340 	/* Decompress header and construct ether frame */
341 	switch (type & BNEP_TYPE_MASK) {
342 	case BNEP_COMPRESSED:
343 		memcpy(__skb_put(nskb, ETH_HLEN), &s->eh, ETH_HLEN);
344 		break;
345 
346 	case BNEP_COMPRESSED_SRC_ONLY:
347 		memcpy(__skb_put(nskb, ETH_ALEN), s->eh.h_dest, ETH_ALEN);
348 		memcpy(__skb_put(nskb, ETH_ALEN), skb_mac_header(skb), ETH_ALEN);
349 		put_unaligned(s->eh.h_proto, (__be16 *) __skb_put(nskb, 2));
350 		break;
351 
352 	case BNEP_COMPRESSED_DST_ONLY:
353 		memcpy(__skb_put(nskb, ETH_ALEN), skb_mac_header(skb),
354 								ETH_ALEN);
355 		memcpy(__skb_put(nskb, ETH_ALEN + 2), s->eh.h_source,
356 								ETH_ALEN + 2);
357 		break;
358 
359 	case BNEP_GENERAL:
360 		memcpy(__skb_put(nskb, ETH_ALEN * 2), skb_mac_header(skb),
361 								ETH_ALEN * 2);
362 		put_unaligned(s->eh.h_proto, (__be16 *) __skb_put(nskb, 2));
363 		break;
364 	}
365 
366 	skb_copy_from_linear_data(skb, __skb_put(nskb, skb->len), skb->len);
367 	kfree_skb(skb);
368 
369 	dev->stats.rx_packets++;
370 	nskb->ip_summed = CHECKSUM_NONE;
371 	nskb->protocol  = eth_type_trans(nskb, dev);
372 	netif_rx_ni(nskb);
373 	return 0;
374 
375 badframe:
376 	dev->stats.rx_errors++;
377 	kfree_skb(skb);
378 	return 0;
379 }
380 
381 static u8 __bnep_tx_types[] = {
382 	BNEP_GENERAL,
383 	BNEP_COMPRESSED_SRC_ONLY,
384 	BNEP_COMPRESSED_DST_ONLY,
385 	BNEP_COMPRESSED
386 };
387 
388 static int bnep_tx_frame(struct bnep_session *s, struct sk_buff *skb)
389 {
390 	struct ethhdr *eh = (void *) skb->data;
391 	struct socket *sock = s->sock;
392 	struct kvec iv[3];
393 	int len = 0, il = 0;
394 	u8 type = 0;
395 
396 	BT_DBG("skb %p dev %p type %d", skb, skb->dev, skb->pkt_type);
397 
398 	if (!skb->dev) {
399 		/* Control frame sent by us */
400 		goto send;
401 	}
402 
403 	iv[il++] = (struct kvec) { &type, 1 };
404 	len++;
405 
406 	if (compress_src && ether_addr_equal(eh->h_dest, s->eh.h_source))
407 		type |= 0x01;
408 
409 	if (compress_dst && ether_addr_equal(eh->h_source, s->eh.h_dest))
410 		type |= 0x02;
411 
412 	if (type)
413 		skb_pull(skb, ETH_ALEN * 2);
414 
415 	type = __bnep_tx_types[type];
416 	switch (type) {
417 	case BNEP_COMPRESSED_SRC_ONLY:
418 		iv[il++] = (struct kvec) { eh->h_source, ETH_ALEN };
419 		len += ETH_ALEN;
420 		break;
421 
422 	case BNEP_COMPRESSED_DST_ONLY:
423 		iv[il++] = (struct kvec) { eh->h_dest, ETH_ALEN };
424 		len += ETH_ALEN;
425 		break;
426 	}
427 
428 send:
429 	iv[il++] = (struct kvec) { skb->data, skb->len };
430 	len += skb->len;
431 
432 	/* FIXME: linearize skb */
433 	{
434 		len = kernel_sendmsg(sock, &s->msg, iv, il, len);
435 	}
436 	kfree_skb(skb);
437 
438 	if (len > 0) {
439 		s->dev->stats.tx_bytes += len;
440 		s->dev->stats.tx_packets++;
441 		return 0;
442 	}
443 
444 	return len;
445 }
446 
447 static int bnep_session(void *arg)
448 {
449 	struct bnep_session *s = arg;
450 	struct net_device *dev = s->dev;
451 	struct sock *sk = s->sock->sk;
452 	struct sk_buff *skb;
453 	wait_queue_t wait;
454 
455 	BT_DBG("");
456 
457 	set_user_nice(current, -15);
458 
459 	init_waitqueue_entry(&wait, current);
460 	add_wait_queue(sk_sleep(sk), &wait);
461 	while (1) {
462 		set_current_state(TASK_INTERRUPTIBLE);
463 
464 		if (atomic_read(&s->terminate))
465 			break;
466 		/* RX */
467 		while ((skb = skb_dequeue(&sk->sk_receive_queue))) {
468 			skb_orphan(skb);
469 			if (!skb_linearize(skb))
470 				bnep_rx_frame(s, skb);
471 			else
472 				kfree_skb(skb);
473 		}
474 
475 		if (sk->sk_state != BT_CONNECTED)
476 			break;
477 
478 		/* TX */
479 		while ((skb = skb_dequeue(&sk->sk_write_queue)))
480 			if (bnep_tx_frame(s, skb))
481 				break;
482 		netif_wake_queue(dev);
483 
484 		schedule();
485 	}
486 	__set_current_state(TASK_RUNNING);
487 	remove_wait_queue(sk_sleep(sk), &wait);
488 
489 	/* Cleanup session */
490 	down_write(&bnep_session_sem);
491 
492 	/* Delete network device */
493 	unregister_netdev(dev);
494 
495 	/* Wakeup user-space polling for socket errors */
496 	s->sock->sk->sk_err = EUNATCH;
497 
498 	wake_up_interruptible(sk_sleep(s->sock->sk));
499 
500 	/* Release the socket */
501 	fput(s->sock->file);
502 
503 	__bnep_unlink_session(s);
504 
505 	up_write(&bnep_session_sem);
506 	free_netdev(dev);
507 	module_put_and_exit(0);
508 	return 0;
509 }
510 
511 static struct device *bnep_get_device(struct bnep_session *session)
512 {
513 	bdaddr_t *src = &bt_sk(session->sock->sk)->src;
514 	bdaddr_t *dst = &bt_sk(session->sock->sk)->dst;
515 	struct hci_dev *hdev;
516 	struct hci_conn *conn;
517 
518 	hdev = hci_get_route(dst, src);
519 	if (!hdev)
520 		return NULL;
521 
522 	conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, dst);
523 
524 	hci_dev_put(hdev);
525 
526 	return conn ? &conn->dev : NULL;
527 }
528 
529 static struct device_type bnep_type = {
530 	.name	= "bluetooth",
531 };
532 
533 int bnep_add_connection(struct bnep_connadd_req *req, struct socket *sock)
534 {
535 	struct net_device *dev;
536 	struct bnep_session *s, *ss;
537 	u8 dst[ETH_ALEN], src[ETH_ALEN];
538 	int err;
539 
540 	BT_DBG("");
541 
542 	baswap((void *) dst, &bt_sk(sock->sk)->dst);
543 	baswap((void *) src, &bt_sk(sock->sk)->src);
544 
545 	/* session struct allocated as private part of net_device */
546 	dev = alloc_netdev(sizeof(struct bnep_session),
547 				(*req->device) ? req->device : "bnep%d",
548 				bnep_net_setup);
549 	if (!dev)
550 		return -ENOMEM;
551 
552 	down_write(&bnep_session_sem);
553 
554 	ss = __bnep_get_session(dst);
555 	if (ss && ss->state == BT_CONNECTED) {
556 		err = -EEXIST;
557 		goto failed;
558 	}
559 
560 	s = netdev_priv(dev);
561 
562 	/* This is rx header therefore addresses are swapped.
563 	 * ie. eh.h_dest is our local address. */
564 	memcpy(s->eh.h_dest,   &src, ETH_ALEN);
565 	memcpy(s->eh.h_source, &dst, ETH_ALEN);
566 	memcpy(dev->dev_addr, s->eh.h_dest, ETH_ALEN);
567 
568 	s->dev   = dev;
569 	s->sock  = sock;
570 	s->role  = req->role;
571 	s->state = BT_CONNECTED;
572 
573 	s->msg.msg_flags = MSG_NOSIGNAL;
574 
575 #ifdef CONFIG_BT_BNEP_MC_FILTER
576 	/* Set default mc filter */
577 	set_bit(bnep_mc_hash(dev->broadcast), (ulong *) &s->mc_filter);
578 #endif
579 
580 #ifdef CONFIG_BT_BNEP_PROTO_FILTER
581 	/* Set default protocol filter */
582 	bnep_set_default_proto_filter(s);
583 #endif
584 
585 	SET_NETDEV_DEV(dev, bnep_get_device(s));
586 	SET_NETDEV_DEVTYPE(dev, &bnep_type);
587 
588 	err = register_netdev(dev);
589 	if (err)
590 		goto failed;
591 
592 	__bnep_link_session(s);
593 
594 	__module_get(THIS_MODULE);
595 	s->task = kthread_run(bnep_session, s, "kbnepd %s", dev->name);
596 	if (IS_ERR(s->task)) {
597 		/* Session thread start failed, gotta cleanup. */
598 		module_put(THIS_MODULE);
599 		unregister_netdev(dev);
600 		__bnep_unlink_session(s);
601 		err = PTR_ERR(s->task);
602 		goto failed;
603 	}
604 
605 	up_write(&bnep_session_sem);
606 	strcpy(req->device, dev->name);
607 	return 0;
608 
609 failed:
610 	up_write(&bnep_session_sem);
611 	free_netdev(dev);
612 	return err;
613 }
614 
615 int bnep_del_connection(struct bnep_conndel_req *req)
616 {
617 	struct bnep_session *s;
618 	int  err = 0;
619 
620 	BT_DBG("");
621 
622 	down_read(&bnep_session_sem);
623 
624 	s = __bnep_get_session(req->dst);
625 	if (s) {
626 		atomic_inc(&s->terminate);
627 		wake_up_process(s->task);
628 	} else
629 		err = -ENOENT;
630 
631 	up_read(&bnep_session_sem);
632 	return err;
633 }
634 
635 static void __bnep_copy_ci(struct bnep_conninfo *ci, struct bnep_session *s)
636 {
637 	memset(ci, 0, sizeof(*ci));
638 	memcpy(ci->dst, s->eh.h_source, ETH_ALEN);
639 	strcpy(ci->device, s->dev->name);
640 	ci->flags = s->flags;
641 	ci->state = s->state;
642 	ci->role  = s->role;
643 }
644 
645 int bnep_get_connlist(struct bnep_connlist_req *req)
646 {
647 	struct bnep_session *s;
648 	int err = 0, n = 0;
649 
650 	down_read(&bnep_session_sem);
651 
652 	list_for_each_entry(s, &bnep_session_list, list) {
653 		struct bnep_conninfo ci;
654 
655 		__bnep_copy_ci(&ci, s);
656 
657 		if (copy_to_user(req->ci, &ci, sizeof(ci))) {
658 			err = -EFAULT;
659 			break;
660 		}
661 
662 		if (++n >= req->cnum)
663 			break;
664 
665 		req->ci++;
666 	}
667 	req->cnum = n;
668 
669 	up_read(&bnep_session_sem);
670 	return err;
671 }
672 
673 int bnep_get_conninfo(struct bnep_conninfo *ci)
674 {
675 	struct bnep_session *s;
676 	int err = 0;
677 
678 	down_read(&bnep_session_sem);
679 
680 	s = __bnep_get_session(ci->dst);
681 	if (s)
682 		__bnep_copy_ci(ci, s);
683 	else
684 		err = -ENOENT;
685 
686 	up_read(&bnep_session_sem);
687 	return err;
688 }
689 
690 static int __init bnep_init(void)
691 {
692 	char flt[50] = "";
693 
694 #ifdef CONFIG_BT_BNEP_PROTO_FILTER
695 	strcat(flt, "protocol ");
696 #endif
697 
698 #ifdef CONFIG_BT_BNEP_MC_FILTER
699 	strcat(flt, "multicast");
700 #endif
701 
702 	BT_INFO("BNEP (Ethernet Emulation) ver %s", VERSION);
703 	if (flt[0])
704 		BT_INFO("BNEP filters: %s", flt);
705 
706 	bnep_sock_init();
707 	return 0;
708 }
709 
710 static void __exit bnep_exit(void)
711 {
712 	bnep_sock_cleanup();
713 }
714 
715 module_init(bnep_init);
716 module_exit(bnep_exit);
717 
718 module_param(compress_src, bool, 0644);
719 MODULE_PARM_DESC(compress_src, "Compress sources headers");
720 
721 module_param(compress_dst, bool, 0644);
722 MODULE_PARM_DESC(compress_dst, "Compress destination headers");
723 
724 MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
725 MODULE_DESCRIPTION("Bluetooth BNEP ver " VERSION);
726 MODULE_VERSION(VERSION);
727 MODULE_LICENSE("GPL");
728 MODULE_ALIAS("bt-proto-4");
729