net/can/raw.c

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