1/*
  2 * raw.c - Raw sockets for protocol family CAN
  3 *
  4 * Copyright (c) 2002-2007 Volkswagen Group Electronic Research
  5 * All rights reserved.
  6 *
  7 * Redistribution and use in source and binary forms, with or without
  8 * modification, are permitted provided that the following conditions
  9 * are met:
 10 * 1. Redistributions of source code must retain the above copyright
 11 *    notice, this list of conditions and the following disclaimer.
 12 * 2. Redistributions in binary form must reproduce the above copyright
 13 *    notice, this list of conditions and the following disclaimer in the
 14 *    documentation and/or other materials provided with the distribution.
 15 * 3. Neither the name of Volkswagen nor the names of its contributors
 16 *    may be used to endorse or promote products derived from this software
 17 *    without specific prior written permission.
 18 *
 19 * Alternatively, provided that this notice is retained in full, this
 20 * software may be distributed under the terms of the GNU General
 21 * Public License ("GPL") version 2, in which case the provisions of the
 22 * GPL apply INSTEAD OF those given above.
 23 *
 24 * The provided data structures and external interfaces from this code
 25 * are not restricted to be used by modules with a GPL compatible license.
 26 *
 27 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 28 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 29 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 30 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 31 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 32 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 33 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 34 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 35 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 36 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 37 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
 38 * DAMAGE.
 39 *
 40 * Send feedback to <socketcan-users@lists.berlios.de>
 41 *
 42 */
 43
 44#include <linux/module.h>
 45#include <linux/init.h>
 46#include <linux/uio.h>
 47#include <linux/net.h>
 48#include <linux/slab.h>
 49#include <linux/netdevice.h>
 50#include <linux/socket.h>
 51#include <linux/if_arp.h>
 52#include <linux/skbuff.h>
 53#include <linux/can.h>
 54#include <linux/can/core.h>
 
 
 55#include <linux/can/raw.h>
 56#include <net/sock.h>
 57#include <net/net_namespace.h>
 58
 59#define CAN_RAW_VERSION CAN_VERSION
 60static __initdata const char banner[] =
 61	KERN_INFO "can: raw protocol (rev " CAN_RAW_VERSION ")\n";
 62
 63MODULE_DESCRIPTION("PF_CAN raw protocol");
 64MODULE_LICENSE("Dual BSD/GPL");
 65MODULE_AUTHOR("Urs Thuermann <urs.thuermann@volkswagen.de>");
 66MODULE_ALIAS("can-proto-1");
 67
 
 
 68#define MASK_ALL 0
 69
 70/*
 71 * A raw socket has a list of can_filters attached to it, each receiving
 72 * the CAN frames matching that filter.  If the filter list is empty,
 73 * no CAN frames will be received by the socket.  The default after
 74 * opening the socket, is to have one filter which receives all frames.
 75 * The filter list is allocated dynamically with the exception of the
 76 * list containing only one item.  This common case is optimized by
 77 * storing the single filter in dfilter, to avoid using dynamic memory.
 78 */
 79
 
 
 
 
 
 
 80struct raw_sock {
 81	struct sock sk;
 82	int bound;
 83	int ifindex;
 84	struct notifier_block notifier;
 85	int loopback;
 86	int recv_own_msgs;
 
 
 
 87	int count;                 /* number of active filters */
 88	struct can_filter dfilter; /* default/single filter */
 89	struct can_filter *filter; /* pointer to filter(s) */
 90	can_err_mask_t err_mask;
 
 91};
 92
 93/*
 94 * Return pointer to store the extra msg flags for raw_recvmsg().
 
 
 
 95 * We use the space of one unsigned int beyond the 'struct sockaddr_can'
 96 * in skb->cb.
 97 */
 98static inline unsigned int *raw_flags(struct sk_buff *skb)
 99{
100	BUILD_BUG_ON(sizeof(skb->cb) <= (sizeof(struct sockaddr_can) +
101					 sizeof(unsigned int)));
102
103	/* return pointer after struct sockaddr_can */
104	return (unsigned int *)(&((struct sockaddr_can *)skb->cb)[1]);
105}
106
107static inline struct raw_sock *raw_sk(const struct sock *sk)
108{
109	return (struct raw_sock *)sk;
110}
111
112static void raw_rcv(struct sk_buff *oskb, void *data)
113{
114	struct sock *sk = (struct sock *)data;
115	struct raw_sock *ro = raw_sk(sk);
116	struct sockaddr_can *addr;
117	struct sk_buff *skb;
118	unsigned int *pflags;
119
120	/* check the received tx sock reference */
121	if (!ro->recv_own_msgs && oskb->sk == sk)
122		return;
123
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
124	/* clone the given skb to be able to enqueue it into the rcv queue */
125	skb = skb_clone(oskb, GFP_ATOMIC);
126	if (!skb)
127		return;
128
129	/*
130	 *  Put the datagram to the queue so that raw_recvmsg() can
131	 *  get it from there.  We need to pass the interface index to
132	 *  raw_recvmsg().  We pass a whole struct sockaddr_can in skb->cb
133	 *  containing the interface index.
134	 */
135
136	BUILD_BUG_ON(sizeof(skb->cb) < sizeof(struct sockaddr_can));
137	addr = (struct sockaddr_can *)skb->cb;
138	memset(addr, 0, sizeof(*addr));
139	addr->can_family  = AF_CAN;
140	addr->can_ifindex = skb->dev->ifindex;
141
142	/* add CAN specific message flags for raw_recvmsg() */
143	pflags = raw_flags(skb);
144	*pflags = 0;
145	if (oskb->sk)
146		*pflags |= MSG_DONTROUTE;
147	if (oskb->sk == sk)
148		*pflags |= MSG_CONFIRM;
149
150	if (sock_queue_rcv_skb(sk, skb) < 0)
151		kfree_skb(skb);
152}
153
154static int raw_enable_filters(struct net_device *dev, struct sock *sk,
155			      struct can_filter *filter, int count)
 
156{
157	int err = 0;
158	int i;
159
160	for (i = 0; i < count; i++) {
161		err = can_rx_register(dev, filter[i].can_id,
162				      filter[i].can_mask,
163				      raw_rcv, sk, "raw");
164		if (err) {
165			/* clean up successfully registered filters */
166			while (--i >= 0)
167				can_rx_unregister(dev, filter[i].can_id,
168						  filter[i].can_mask,
169						  raw_rcv, sk);
170			break;
171		}
172	}
173
174	return err;
175}
176
177static int raw_enable_errfilter(struct net_device *dev, struct sock *sk,
178				can_err_mask_t err_mask)
179{
180	int err = 0;
181
182	if (err_mask)
183		err = can_rx_register(dev, 0, err_mask | CAN_ERR_FLAG,
184				      raw_rcv, sk, "raw");
185
186	return err;
187}
188
189static void raw_disable_filters(struct net_device *dev, struct sock *sk,
190			      struct can_filter *filter, int count)
 
191{
192	int i;
193
194	for (i = 0; i < count; i++)
195		can_rx_unregister(dev, filter[i].can_id, filter[i].can_mask,
196				  raw_rcv, sk);
197}
198
199static inline void raw_disable_errfilter(struct net_device *dev,
 
200					 struct sock *sk,
201					 can_err_mask_t err_mask)
202
203{
204	if (err_mask)
205		can_rx_unregister(dev, 0, err_mask | CAN_ERR_FLAG,
206				  raw_rcv, sk);
207}
208
209static inline void raw_disable_allfilters(struct net_device *dev,
 
210					  struct sock *sk)
211{
212	struct raw_sock *ro = raw_sk(sk);
213
214	raw_disable_filters(dev, sk, ro->filter, ro->count);
215	raw_disable_errfilter(dev, sk, ro->err_mask);
216}
217
218static int raw_enable_allfilters(struct net_device *dev, struct sock *sk)
 
219{
220	struct raw_sock *ro = raw_sk(sk);
221	int err;
222
223	err = raw_enable_filters(dev, sk, ro->filter, ro->count);
224	if (!err) {
225		err = raw_enable_errfilter(dev, sk, ro->err_mask);
226		if (err)
227			raw_disable_filters(dev, sk, ro->filter, ro->count);
 
228	}
229
230	return err;
231}
232
233static int raw_notifier(struct notifier_block *nb,
234			unsigned long msg, void *data)
235{
236	struct net_device *dev = (struct net_device *)data;
237	struct raw_sock *ro = container_of(nb, struct raw_sock, notifier);
238	struct sock *sk = &ro->sk;
239
240	if (!net_eq(dev_net(dev), &init_net))
241		return NOTIFY_DONE;
242
243	if (dev->type != ARPHRD_CAN)
244		return NOTIFY_DONE;
245
246	if (ro->ifindex != dev->ifindex)
247		return NOTIFY_DONE;
248
249	switch (msg) {
250
251	case NETDEV_UNREGISTER:
252		lock_sock(sk);
253		/* remove current filters & unregister */
254		if (ro->bound)
255			raw_disable_allfilters(dev, sk);
256
257		if (ro->count > 1)
258			kfree(ro->filter);
259
260		ro->ifindex = 0;
261		ro->bound   = 0;
262		ro->count   = 0;
263		release_sock(sk);
264
265		sk->sk_err = ENODEV;
266		if (!sock_flag(sk, SOCK_DEAD))
267			sk->sk_error_report(sk);
268		break;
269
270	case NETDEV_DOWN:
271		sk->sk_err = ENETDOWN;
272		if (!sock_flag(sk, SOCK_DEAD))
273			sk->sk_error_report(sk);
274		break;
275	}
 
 
 
 
 
 
276
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
277	return NOTIFY_DONE;
278}
279
280static int raw_init(struct sock *sk)
281{
282	struct raw_sock *ro = raw_sk(sk);
283
284	ro->bound            = 0;
285	ro->ifindex          = 0;
286
287	/* set default filter to single entry dfilter */
288	ro->dfilter.can_id   = 0;
289	ro->dfilter.can_mask = MASK_ALL;
290	ro->filter           = &ro->dfilter;
291	ro->count            = 1;
292
293	/* set default loopback behaviour */
294	ro->loopback         = 1;
295	ro->recv_own_msgs    = 0;
 
 
 
 
 
 
 
 
296
297	/* set notifier */
298	ro->notifier.notifier_call = raw_notifier;
299
300	register_netdevice_notifier(&ro->notifier);
301
302	return 0;
303}
304
305static int raw_release(struct socket *sock)
306{
307	struct sock *sk = sock->sk;
308	struct raw_sock *ro;
309
310	if (!sk)
311		return 0;
312
313	ro = raw_sk(sk);
314
315	unregister_netdevice_notifier(&ro->notifier);
 
 
 
 
 
 
 
316
317	lock_sock(sk);
318
319	/* remove current filters & unregister */
320	if (ro->bound) {
321		if (ro->ifindex) {
322			struct net_device *dev;
323
324			dev = dev_get_by_index(&init_net, ro->ifindex);
325			if (dev) {
326				raw_disable_allfilters(dev, sk);
327				dev_put(dev);
328			}
329		} else
330			raw_disable_allfilters(NULL, sk);
 
331	}
332
333	if (ro->count > 1)
334		kfree(ro->filter);
335
336	ro->ifindex = 0;
337	ro->bound   = 0;
338	ro->count   = 0;
 
339
340	sock_orphan(sk);
341	sock->sk = NULL;
342
343	release_sock(sk);
344	sock_put(sk);
345
346	return 0;
347}
348
349static int raw_bind(struct socket *sock, struct sockaddr *uaddr, int len)
350{
351	struct sockaddr_can *addr = (struct sockaddr_can *)uaddr;
352	struct sock *sk = sock->sk;
353	struct raw_sock *ro = raw_sk(sk);
354	int ifindex;
355	int err = 0;
356	int notify_enetdown = 0;
357
358	if (len < sizeof(*addr))
 
 
359		return -EINVAL;
360
361	lock_sock(sk);
362
363	if (ro->bound && addr->can_ifindex == ro->ifindex)
364		goto out;
365
366	if (addr->can_ifindex) {
367		struct net_device *dev;
368
369		dev = dev_get_by_index(&init_net, addr->can_ifindex);
370		if (!dev) {
371			err = -ENODEV;
372			goto out;
373		}
374		if (dev->type != ARPHRD_CAN) {
375			dev_put(dev);
376			err = -ENODEV;
377			goto out;
378		}
379		if (!(dev->flags & IFF_UP))
380			notify_enetdown = 1;
381
382		ifindex = dev->ifindex;
383
384		/* filters set by default/setsockopt */
385		err = raw_enable_allfilters(dev, sk);
386		dev_put(dev);
387	} else {
388		ifindex = 0;
389
390		/* filters set by default/setsockopt */
391		err = raw_enable_allfilters(NULL, sk);
392	}
393
394	if (!err) {
395		if (ro->bound) {
396			/* unregister old filters */
397			if (ro->ifindex) {
398				struct net_device *dev;
399
400				dev = dev_get_by_index(&init_net, ro->ifindex);
 
401				if (dev) {
402					raw_disable_allfilters(dev, sk);
 
403					dev_put(dev);
404				}
405			} else
406				raw_disable_allfilters(NULL, sk);
 
407		}
408		ro->ifindex = ifindex;
409		ro->bound = 1;
410	}
411
412 out:
413	release_sock(sk);
414
415	if (notify_enetdown) {
416		sk->sk_err = ENETDOWN;
417		if (!sock_flag(sk, SOCK_DEAD))
418			sk->sk_error_report(sk);
419	}
420
421	return err;
422}
423
424static int raw_getname(struct socket *sock, struct sockaddr *uaddr,
425		       int *len, int peer)
426{
427	struct sockaddr_can *addr = (struct sockaddr_can *)uaddr;
428	struct sock *sk = sock->sk;
429	struct raw_sock *ro = raw_sk(sk);
430
431	if (peer)
432		return -EOPNOTSUPP;
433
434	memset(addr, 0, sizeof(*addr));
435	addr->can_family  = AF_CAN;
436	addr->can_ifindex = ro->ifindex;
437
438	*len = sizeof(*addr);
439
440	return 0;
441}
442
443static int raw_setsockopt(struct socket *sock, int level, int optname,
444			  char __user *optval, unsigned int optlen)
445{
446	struct sock *sk = sock->sk;
447	struct raw_sock *ro = raw_sk(sk);
448	struct can_filter *filter = NULL;  /* dyn. alloc'ed filters */
449	struct can_filter sfilter;         /* single filter */
450	struct net_device *dev = NULL;
451	can_err_mask_t err_mask = 0;
452	int count = 0;
453	int err = 0;
454
455	if (level != SOL_CAN_RAW)
456		return -EINVAL;
457
458	switch (optname) {
459
460	case CAN_RAW_FILTER:
461		if (optlen % sizeof(struct can_filter) != 0)
462			return -EINVAL;
463
 
 
 
464		count = optlen / sizeof(struct can_filter);
465
466		if (count > 1) {
467			/* filter does not fit into dfilter => alloc space */
468			filter = memdup_user(optval, optlen);
469			if (IS_ERR(filter))
470				return PTR_ERR(filter);
471		} else if (count == 1) {
472			if (copy_from_user(&sfilter, optval, sizeof(sfilter)))
473				return -EFAULT;
474		}
475
 
476		lock_sock(sk);
477
478		if (ro->bound && ro->ifindex)
479			dev = dev_get_by_index(&init_net, ro->ifindex);
 
 
 
 
 
 
 
480
481		if (ro->bound) {
482			/* (try to) register the new filters */
483			if (count == 1)
484				err = raw_enable_filters(dev, sk, &sfilter, 1);
 
485			else
486				err = raw_enable_filters(dev, sk, filter,
487							 count);
488			if (err) {
489				if (count > 1)
490					kfree(filter);
491				goto out_fil;
492			}
493
494			/* remove old filter registrations */
495			raw_disable_filters(dev, sk, ro->filter, ro->count);
 
496		}
497
498		/* remove old filter space */
499		if (ro->count > 1)
500			kfree(ro->filter);
501
502		/* link new filters to the socket */
503		if (count == 1) {
504			/* copy filter data for single filter */
505			ro->dfilter = sfilter;
506			filter = &ro->dfilter;
507		}
508		ro->filter = filter;
509		ro->count  = count;
510
511 out_fil:
512		if (dev)
513			dev_put(dev);
514
515		release_sock(sk);
 
516
517		break;
518
519	case CAN_RAW_ERR_FILTER:
520		if (optlen != sizeof(err_mask))
521			return -EINVAL;
522
523		if (copy_from_user(&err_mask, optval, optlen))
524			return -EFAULT;
525
526		err_mask &= CAN_ERR_MASK;
527
 
528		lock_sock(sk);
529
530		if (ro->bound && ro->ifindex)
531			dev = dev_get_by_index(&init_net, ro->ifindex);
 
 
 
 
 
532
533		/* remove current error mask */
534		if (ro->bound) {
535			/* (try to) register the new err_mask */
536			err = raw_enable_errfilter(dev, sk, err_mask);
 
537
538			if (err)
539				goto out_err;
540
541			/* remove old err_mask registration */
542			raw_disable_errfilter(dev, sk, ro->err_mask);
 
543		}
544
545		/* link new err_mask to the socket */
546		ro->err_mask = err_mask;
547
548 out_err:
549		if (dev)
550			dev_put(dev);
551
552		release_sock(sk);
 
553
554		break;
555
556	case CAN_RAW_LOOPBACK:
557		if (optlen != sizeof(ro->loopback))
558			return -EINVAL;
559
560		if (copy_from_user(&ro->loopback, optval, optlen))
561			return -EFAULT;
562
563		break;
564
565	case CAN_RAW_RECV_OWN_MSGS:
566		if (optlen != sizeof(ro->recv_own_msgs))
567			return -EINVAL;
568
569		if (copy_from_user(&ro->recv_own_msgs, optval, optlen))
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
570			return -EFAULT;
571
572		break;
573
574	default:
575		return -ENOPROTOOPT;
576	}
577	return err;
578}
579
580static int raw_getsockopt(struct socket *sock, int level, int optname,
581			  char __user *optval, int __user *optlen)
582{
583	struct sock *sk = sock->sk;
584	struct raw_sock *ro = raw_sk(sk);
585	int len;
586	void *val;
587	int err = 0;
588
589	if (level != SOL_CAN_RAW)
590		return -EINVAL;
591	if (get_user(len, optlen))
592		return -EFAULT;
593	if (len < 0)
594		return -EINVAL;
595
596	switch (optname) {
597
598	case CAN_RAW_FILTER:
599		lock_sock(sk);
600		if (ro->count > 0) {
601			int fsize = ro->count * sizeof(struct can_filter);
602			if (len > fsize)
603				len = fsize;
604			if (copy_to_user(optval, ro->filter, len))
605				err = -EFAULT;
606		} else
 
 
 
 
 
 
 
 
 
607			len = 0;
 
608		release_sock(sk);
609
610		if (!err)
611			err = put_user(len, optlen);
612		return err;
613
614	case CAN_RAW_ERR_FILTER:
615		if (len > sizeof(can_err_mask_t))
616			len = sizeof(can_err_mask_t);
617		val = &ro->err_mask;
618		break;
619
620	case CAN_RAW_LOOPBACK:
621		if (len > sizeof(int))
622			len = sizeof(int);
623		val = &ro->loopback;
624		break;
625
626	case CAN_RAW_RECV_OWN_MSGS:
627		if (len > sizeof(int))
628			len = sizeof(int);
629		val = &ro->recv_own_msgs;
630		break;
631
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
632	default:
633		return -ENOPROTOOPT;
634	}
635
636	if (put_user(len, optlen))
637		return -EFAULT;
638	if (copy_to_user(optval, val, len))
639		return -EFAULT;
640	return 0;
641}
642
643static int raw_sendmsg(struct kiocb *iocb, struct socket *sock,
644		       struct msghdr *msg, size_t size)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
645{
646	struct sock *sk = sock->sk;
647	struct raw_sock *ro = raw_sk(sk);
 
648	struct sk_buff *skb;
649	struct net_device *dev;
650	int ifindex;
651	int err;
 
 
 
 
652
653	if (msg->msg_name) {
654		struct sockaddr_can *addr =
655			(struct sockaddr_can *)msg->msg_name;
656
657		if (msg->msg_namelen < sizeof(*addr))
658			return -EINVAL;
659
660		if (addr->can_family != AF_CAN)
661			return -EINVAL;
662
663		ifindex = addr->can_ifindex;
664	} else
665		ifindex = ro->ifindex;
 
666
667	if (size != sizeof(struct can_frame))
668		return -EINVAL;
669
670	dev = dev_get_by_index(&init_net, ifindex);
671	if (!dev)
672		return -ENXIO;
673
674	skb = sock_alloc_send_skb(sk, size, msg->msg_flags & MSG_DONTWAIT,
675				  &err);
676	if (!skb)
677		goto put_dev;
678
679	err = memcpy_fromiovec(skb_put(skb, size), msg->msg_iov, size);
 
 
 
 
 
680	if (err < 0)
681		goto free_skb;
682	err = sock_tx_timestamp(sk, &skb_shinfo(skb)->tx_flags);
683	if (err < 0)
 
684		goto free_skb;
685
686	/* to be able to check the received tx sock reference in raw_rcv() */
687	skb_shinfo(skb)->tx_flags |= SKBTX_DRV_NEEDS_SK_REF;
 
 
 
 
688
689	skb->dev = dev;
690	skb->sk  = sk;
 
 
 
 
691
692	err = can_send(skb, ro->loopback);
693
694	dev_put(dev);
695
696	if (err)
697		goto send_failed;
698
699	return size;
700
701free_skb:
702	kfree_skb(skb);
703put_dev:
704	dev_put(dev);
705send_failed:
706	return err;
707}
708
709static int raw_recvmsg(struct kiocb *iocb, struct socket *sock,
710		       struct msghdr *msg, size_t size, int flags)
711{
712	struct sock *sk = sock->sk;
713	struct sk_buff *skb;
714	int err = 0;
715	int noblock;
716
717	noblock =  flags & MSG_DONTWAIT;
718	flags   &= ~MSG_DONTWAIT;
 
719
720	skb = skb_recv_datagram(sk, flags, noblock, &err);
721	if (!skb)
722		return err;
723
724	if (size < skb->len)
725		msg->msg_flags |= MSG_TRUNC;
726	else
727		size = skb->len;
728
729	err = memcpy_toiovec(msg->msg_iov, skb->data, size);
730	if (err < 0) {
731		skb_free_datagram(sk, skb);
732		return err;
733	}
734
735	sock_recv_ts_and_drops(msg, sk, skb);
736
737	if (msg->msg_name) {
738		msg->msg_namelen = sizeof(struct sockaddr_can);
 
739		memcpy(msg->msg_name, skb->cb, msg->msg_namelen);
740	}
741
742	/* assign the flags that have been recorded in raw_rcv() */
743	msg->msg_flags |= *(raw_flags(skb));
744
745	skb_free_datagram(sk, skb);
746
747	return size;
748}
749
 
 
 
 
 
 
 
750static const struct proto_ops raw_ops = {
751	.family        = PF_CAN,
752	.release       = raw_release,
753	.bind          = raw_bind,
754	.connect       = sock_no_connect,
755	.socketpair    = sock_no_socketpair,
756	.accept        = sock_no_accept,
757	.getname       = raw_getname,
758	.poll          = datagram_poll,
759	.ioctl         = can_ioctl,	/* use can_ioctl() from af_can.c */
 
760	.listen        = sock_no_listen,
761	.shutdown      = sock_no_shutdown,
762	.setsockopt    = raw_setsockopt,
763	.getsockopt    = raw_getsockopt,
764	.sendmsg       = raw_sendmsg,
765	.recvmsg       = raw_recvmsg,
766	.mmap          = sock_no_mmap,
767	.sendpage      = sock_no_sendpage,
768};
769
770static struct proto raw_proto __read_mostly = {
771	.name       = "CAN_RAW",
772	.owner      = THIS_MODULE,
773	.obj_size   = sizeof(struct raw_sock),
774	.init       = raw_init,
775};
776
777static const struct can_proto raw_can_proto = {
778	.type       = SOCK_RAW,
779	.protocol   = CAN_RAW,
780	.ops        = &raw_ops,
781	.prot       = &raw_proto,
782};
783
 
 
 
 
784static __init int raw_module_init(void)
785{
786	int err;
787
788	printk(banner);
 
 
 
 
789
790	err = can_proto_register(&raw_can_proto);
791	if (err < 0)
792		printk(KERN_ERR "can: registration of raw protocol failed\n");
 
 
 
 
793
 
 
794	return err;
795}
796
797static __exit void raw_module_exit(void)
798{
799	can_proto_unregister(&raw_can_proto);
 
800}
801
802module_init(raw_module_init);
803module_exit(raw_module_exit);