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