drivers/isdn/mISDN/socket.c

   1 /*
   2  *
   3  * Author       Karsten Keil <kkeil@novell.com>
   4  *
   5  * Copyright 2008  by Karsten Keil <kkeil@novell.com>
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License version 2 as
   9  * published by the Free Software Foundation.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  */
  17
  18 #include <linux/mISDNif.h>
  19 #include <linux/slab.h>
  20 #include "core.h"
  21
  22 static u_int    *debug;
  23
  24 static struct proto mISDN_proto = {
  25         .name           = "misdn",
  26         .owner          = THIS_MODULE,
  27         .obj_size       = sizeof(struct mISDN_sock)
  28 };
  29
  30 #define _pms(sk)        ((struct mISDN_sock *)sk)
  31
  32 static struct mISDN_sock_list   data_sockets = {
  33         .lock = __RW_LOCK_UNLOCKED(data_sockets.lock)
  34 };
  35
  36 static struct mISDN_sock_list   base_sockets = {
  37         .lock = __RW_LOCK_UNLOCKED(base_sockets.lock)
  38 };
  39
  40 #define L2_HEADER_LEN   4
  41
  42 static inline struct sk_buff *
  43 _l2_alloc_skb(unsigned int len, gfp_t gfp_mask)
  44 {
  45         struct sk_buff  *skb;
  46
  47         skb = alloc_skb(len + L2_HEADER_LEN, gfp_mask);
  48         if (likely(skb))
  49                 skb_reserve(skb, L2_HEADER_LEN);
  50         return skb;
  51 }
  52
  53 static void
  54 mISDN_sock_link(struct mISDN_sock_list *l, struct sock *sk)
  55 {
  56         write_lock_bh(&l->lock);
  57         sk_add_node(sk, &l->head);
  58         write_unlock_bh(&l->lock);
  59 }
  60
  61 static void mISDN_sock_unlink(struct mISDN_sock_list *l, struct sock *sk)
  62 {
  63         write_lock_bh(&l->lock);
  64         sk_del_node_init(sk);
  65         write_unlock_bh(&l->lock);
  66 }
  67
  68 static int
  69 mISDN_send(struct mISDNchannel *ch, struct sk_buff *skb)
  70 {
  71         struct mISDN_sock *msk;
  72         int     err;
  73
  74         msk = container_of(ch, struct mISDN_sock, ch);
  75         if (*debug & DEBUG_SOCKET)
  76                 printk(KERN_DEBUG "%s len %d %p\n", __func__, skb->len, skb);
  77         if (msk->sk.sk_state == MISDN_CLOSED)
  78                 return -EUNATCH;
  79         __net_timestamp(skb);
  80         err = sock_queue_rcv_skb(&msk->sk, skb);
  81         if (err)
  82                 printk(KERN_WARNING "%s: error %d\n", __func__, err);
  83         return err;
  84 }
  85
  86 static int
  87 mISDN_ctrl(struct mISDNchannel *ch, u_int cmd, void *arg)
  88 {
  89         struct mISDN_sock *msk;
  90
  91         msk = container_of(ch, struct mISDN_sock, ch);
  92         if (*debug & DEBUG_SOCKET)
  93                 printk(KERN_DEBUG "%s(%p, %x, %p)\n", __func__, ch, cmd, arg);
  94         switch (cmd) {
  95         case CLOSE_CHANNEL:
  96                 msk->sk.sk_state = MISDN_CLOSED;
  97                 break;
  98         }
  99         return 0;
 100 }
 101
 102 static inline void
 103 mISDN_sock_cmsg(struct sock *sk, struct msghdr *msg, struct sk_buff *skb)
 104 {
 105         struct timeval  tv;
 106
 107         if (_pms(sk)->cmask & MISDN_TIME_STAMP) {
 108                 skb_get_timestamp(skb, &tv);
 109                 put_cmsg(msg, SOL_MISDN, MISDN_TIME_STAMP, sizeof(tv), &tv);
 110         }
 111 }
 112
 113 static int
 114 mISDN_sock_recvmsg(struct kiocb *iocb, struct socket *sock,
 115     struct msghdr *msg, size_t len, int flags)
 116 {
 117         struct sk_buff          *skb;
 118         struct sock             *sk = sock->sk;
 119         struct sockaddr_mISDN   *maddr;
 120
 121         int             copied, err;
 122
 123         if (*debug & DEBUG_SOCKET)
 124                 printk(KERN_DEBUG "%s: len %d, flags %x ch.nr %d, proto %x\n",
 125                         __func__, (int)len, flags, _pms(sk)->ch.nr,
 126                         sk->sk_protocol);
 127         if (flags & (MSG_OOB))
 128                 return -EOPNOTSUPP;
 129
 130         if (sk->sk_state == MISDN_CLOSED)
 131                 return 0;
 132
 133         skb = skb_recv_datagram(sk, flags, flags & MSG_DONTWAIT, &err);
 134         if (!skb)
 135                 return err;
 136
 137         if (msg->msg_namelen >= sizeof(struct sockaddr_mISDN)) {
 138                 msg->msg_namelen = sizeof(struct sockaddr_mISDN);
 139                 maddr = (struct sockaddr_mISDN *)msg->msg_name;
 140                 maddr->family = AF_ISDN;
 141                 maddr->dev = _pms(sk)->dev->id;
 142                 if ((sk->sk_protocol == ISDN_P_LAPD_TE) ||
 143                     (sk->sk_protocol == ISDN_P_LAPD_NT)) {
 144                         maddr->channel = (mISDN_HEAD_ID(skb) >> 16) & 0xff;
 145                         maddr->tei =  (mISDN_HEAD_ID(skb) >> 8) & 0xff;
 146                         maddr->sapi = mISDN_HEAD_ID(skb) & 0xff;
 147                 } else {
 148                         maddr->channel = _pms(sk)->ch.nr;
 149                         maddr->sapi = _pms(sk)->ch.addr & 0xFF;
 150                         maddr->tei =  (_pms(sk)->ch.addr >> 8) & 0xFF;
 151                 }
 152         } else {
 153                 if (msg->msg_namelen)
 154                         printk(KERN_WARNING "%s: too small namelen %d\n",
 155                             __func__, msg->msg_namelen);
 156                 msg->msg_namelen = 0;
 157         }
 158
 159         copied = skb->len + MISDN_HEADER_LEN;
 160         if (len < copied) {
 161                 if (flags & MSG_PEEK)
 162                         atomic_dec(&skb->users);
 163                 else
 164                         skb_queue_head(&sk->sk_receive_queue, skb);
 165                 return -ENOSPC;
 166         }
 167         memcpy(skb_push(skb, MISDN_HEADER_LEN), mISDN_HEAD_P(skb),
 168             MISDN_HEADER_LEN);
 169
 170         err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
 171
 172         mISDN_sock_cmsg(sk, msg, skb);
 173
 174         skb_free_datagram(sk, skb);
 175
 176         return err ? : copied;
 177 }
 178
 179 static int
 180 mISDN_sock_sendmsg(struct kiocb *iocb, struct socket *sock,
 181     struct msghdr *msg, size_t len)
 182 {
 183         struct sock             *sk = sock->sk;
 184         struct sk_buff          *skb;
 185         int                     err = -ENOMEM;
 186         struct sockaddr_mISDN   *maddr;
 187
 188         if (*debug & DEBUG_SOCKET)
 189                 printk(KERN_DEBUG "%s: len %d flags %x ch %d proto %x\n",
 190                      __func__, (int)len, msg->msg_flags, _pms(sk)->ch.nr,
 191                      sk->sk_protocol);
 192
 193         if (msg->msg_flags & MSG_OOB)
 194                 return -EOPNOTSUPP;
 195
 196         if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_NOSIGNAL|MSG_ERRQUEUE))
 197                 return -EINVAL;
 198
 199         if (len < MISDN_HEADER_LEN)
 200                 return -EINVAL;
 201
 202         if (sk->sk_state != MISDN_BOUND)
 203                 return -EBADFD;
 204
 205         lock_sock(sk);
 206
 207         skb = _l2_alloc_skb(len, GFP_KERNEL);
 208         if (!skb)
 209                 goto done;
 210
 211         if (memcpy_fromiovec(skb_put(skb, len), msg->msg_iov, len)) {
 212                 err = -EFAULT;
 213                 goto done;
 214         }
 215
 216         memcpy(mISDN_HEAD_P(skb), skb->data, MISDN_HEADER_LEN);
 217         skb_pull(skb, MISDN_HEADER_LEN);
 218
 219         if (msg->msg_namelen >= sizeof(struct sockaddr_mISDN)) {
 220                 /* if we have a address, we use it */
 221                 maddr = (struct sockaddr_mISDN *)msg->msg_name;
 222                 mISDN_HEAD_ID(skb) = maddr->channel;
 223         } else { /* use default for L2 messages */
 224                 if ((sk->sk_protocol == ISDN_P_LAPD_TE) ||
 225                     (sk->sk_protocol == ISDN_P_LAPD_NT))
 226                         mISDN_HEAD_ID(skb) = _pms(sk)->ch.nr;
 227         }
 228
 229         if (*debug & DEBUG_SOCKET)
 230                 printk(KERN_DEBUG "%s: ID:%x\n",
 231                      __func__, mISDN_HEAD_ID(skb));
 232
 233         err = -ENODEV;
 234         if (!_pms(sk)->ch.peer)
 235                 goto done;
 236         err = _pms(sk)->ch.recv(_pms(sk)->ch.peer, skb);
 237         if (err)
 238                 goto done;
 239         else {
 240                 skb = NULL;
 241                 err = len;
 242         }
 243
 244 done:
 245         if (skb)
 246                 kfree_skb(skb);
 247         release_sock(sk);
 248         return err;
 249 }
 250
 251 static int
 252 data_sock_release(struct socket *sock)
 253 {
 254         struct sock *sk = sock->sk;
 255
 256         if (*debug & DEBUG_SOCKET)
 257                 printk(KERN_DEBUG "%s(%p) sk=%p\n", __func__, sock, sk);
 258         if (!sk)
 259                 return 0;
 260         switch (sk->sk_protocol) {
 261         case ISDN_P_TE_S0:
 262         case ISDN_P_NT_S0:
 263         case ISDN_P_TE_E1:
 264         case ISDN_P_NT_E1:
 265                 if (sk->sk_state == MISDN_BOUND)
 266                         delete_channel(&_pms(sk)->ch);
 267                 else
 268                         mISDN_sock_unlink(&data_sockets, sk);
 269                 break;
 270         case ISDN_P_LAPD_TE:
 271         case ISDN_P_LAPD_NT:
 272         case ISDN_P_B_RAW:
 273         case ISDN_P_B_HDLC:
 274         case ISDN_P_B_X75SLP:
 275         case ISDN_P_B_L2DTMF:
 276         case ISDN_P_B_L2DSP:
 277         case ISDN_P_B_L2DSPHDLC:
 278                 delete_channel(&_pms(sk)->ch);
 279                 mISDN_sock_unlink(&data_sockets, sk);
 280                 break;
 281         }
 282
 283         lock_sock(sk);
 284
 285         sock_orphan(sk);
 286         skb_queue_purge(&sk->sk_receive_queue);
 287
 288         release_sock(sk);
 289         sock_put(sk);
 290
 291         return 0;
 292 }
 293
 294 static int
 295 data_sock_ioctl_bound(struct sock *sk, unsigned int cmd, void __user *p)
 296 {
 297         struct mISDN_ctrl_req   cq;
 298         int                     err = -EINVAL, val[2];
 299         struct mISDNchannel     *bchan, *next;
 300
 301         lock_sock(sk);
 302         if (!_pms(sk)->dev) {
 303                 err = -ENODEV;
 304                 goto done;
 305         }
 306         switch (cmd) {
 307         case IMCTRLREQ:
 308                 if (copy_from_user(&cq, p, sizeof(cq))) {
 309                         err = -EFAULT;
 310                         break;
 311                 }
 312                 if ((sk->sk_protocol & ~ISDN_P_B_MASK) == ISDN_P_B_START) {
 313                         list_for_each_entry_safe(bchan, next,
 314                                 &_pms(sk)->dev->bchannels, list) {
 315                                 if (bchan->nr == cq.channel) {
 316                                         err = bchan->ctrl(bchan,
 317                                                 CONTROL_CHANNEL, &cq);
 318                                         break;
 319                                 }
 320                         }
 321                 } else
 322                         err = _pms(sk)->dev->D.ctrl(&_pms(sk)->dev->D,
 323                                 CONTROL_CHANNEL, &cq);
 324                 if (err)
 325                         break;
 326                 if (copy_to_user(p, &cq, sizeof(cq)))
 327                         err = -EFAULT;
 328                 break;
 329         case IMCLEAR_L2:
 330                 if (sk->sk_protocol != ISDN_P_LAPD_NT) {
 331                         err = -EINVAL;
 332                         break;
 333                 }
 334                 val[0] = cmd;
 335                 if (get_user(val[1], (int __user *)p)) {
 336                         err = -EFAULT;
 337                         break;
 338                 }
 339                 err = _pms(sk)->dev->teimgr->ctrl(_pms(sk)->dev->teimgr,
 340                     CONTROL_CHANNEL, val);
 341                 break;
 342         case IMHOLD_L1:
 343                 if (sk->sk_protocol != ISDN_P_LAPD_NT
 344                  && sk->sk_protocol != ISDN_P_LAPD_TE) {
 345                         err = -EINVAL;
 346                         break;
 347                 }
 348                 val[0] = cmd;
 349                 if (get_user(val[1], (int __user *)p)) {
 350                         err = -EFAULT;
 351                         break;
 352                 }
 353                 err = _pms(sk)->dev->teimgr->ctrl(_pms(sk)->dev->teimgr,
 354                     CONTROL_CHANNEL, val);
 355                 break;
 356         default:
 357                 err = -EINVAL;
 358                 break;
 359         }
 360 done:
 361         release_sock(sk);
 362         return err;
 363 }
 364
 365 static int
 366 data_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
 367 {
 368         int                     err = 0, id;
 369         struct sock             *sk = sock->sk;
 370         struct mISDNdevice      *dev;
 371         struct mISDNversion     ver;
 372
 373         switch (cmd) {
 374         case IMGETVERSION:
 375                 ver.major = MISDN_MAJOR_VERSION;
 376                 ver.minor = MISDN_MINOR_VERSION;
 377                 ver.release = MISDN_RELEASE;
 378                 if (copy_to_user((void __user *)arg, &ver, sizeof(ver)))
 379                         err = -EFAULT;
 380                 break;
 381         case IMGETCOUNT:
 382                 id = get_mdevice_count();
 383                 if (put_user(id, (int __user *)arg))
 384                         err = -EFAULT;
 385                 break;
 386         case IMGETDEVINFO:
 387                 if (get_user(id, (int __user *)arg)) {
 388                         err = -EFAULT;
 389                         break;
 390                 }
 391                 dev = get_mdevice(id);
 392                 if (dev) {
 393                         struct mISDN_devinfo di;
 394
 395                         memset(&di, 0, sizeof(di));
 396                         di.id = dev->id;
 397                         di.Dprotocols = dev->Dprotocols;
 398                         di.Bprotocols = dev->Bprotocols | get_all_Bprotocols();
 399                         di.protocol = dev->D.protocol;
 400                         memcpy(di.channelmap, dev->channelmap,
 401                                 sizeof(di.channelmap));
 402                         di.nrbchan = dev->nrbchan;
 403                         strcpy(di.name, dev_name(&dev->dev));
 404                         if (copy_to_user((void __user *)arg, &di, sizeof(di)))
 405                                 err = -EFAULT;
 406                 } else
 407                         err = -ENODEV;
 408                 break;
 409         default:
 410                 if (sk->sk_state == MISDN_BOUND)
 411                         err = data_sock_ioctl_bound(sk, cmd,
 412                                 (void __user *)arg);
 413                 else
 414                         err = -ENOTCONN;
 415         }
 416         return err;
 417 }
 418
 419 static int data_sock_setsockopt(struct socket *sock, int level, int optname,
 420         char __user *optval, unsigned int len)
 421 {
 422         struct sock *sk = sock->sk;
 423         int err = 0, opt = 0;
 424
 425         if (*debug & DEBUG_SOCKET)
 426                 printk(KERN_DEBUG "%s(%p, %d, %x, %p, %d)\n", __func__, sock,
 427                     level, optname, optval, len);
 428
 429         lock_sock(sk);
 430
 431         switch (optname) {
 432         case MISDN_TIME_STAMP:
 433                 if (get_user(opt, (int __user *)optval)) {
 434                         err = -EFAULT;
 435                         break;
 436                 }
 437
 438                 if (opt)
 439                         _pms(sk)->cmask |= MISDN_TIME_STAMP;
 440                 else
 441                         _pms(sk)->cmask &= ~MISDN_TIME_STAMP;
 442                 break;
 443         default:
 444                 err = -ENOPROTOOPT;
 445                 break;
 446         }
 447         release_sock(sk);
 448         return err;
 449 }
 450
 451 static int data_sock_getsockopt(struct socket *sock, int level, int optname,
 452         char __user *optval, int __user *optlen)
 453 {
 454         struct sock *sk = sock->sk;
 455         int len, opt;
 456
 457         if (get_user(len, optlen))
 458                 return -EFAULT;
 459
 460         if (len != sizeof(char))
 461                 return -EINVAL;
 462
 463         switch (optname) {
 464         case MISDN_TIME_STAMP:
 465                 if (_pms(sk)->cmask & MISDN_TIME_STAMP)
 466                         opt = 1;
 467                 else
 468                         opt = 0;
 469
 470                 if (put_user(opt, optval))
 471                         return -EFAULT;
 472                 break;
 473         default:
 474                 return -ENOPROTOOPT;
 475         }
 476
 477         return 0;
 478 }
 479
 480 static int
 481 data_sock_bind(struct socket *sock, struct sockaddr *addr, int addr_len)
 482 {
 483         struct sockaddr_mISDN *maddr = (struct sockaddr_mISDN *) addr;
 484         struct sock *sk = sock->sk;
 485         struct hlist_node *node;
 486         struct sock *csk;
 487         int err = 0;
 488
 489         if (*debug & DEBUG_SOCKET)
 490                 printk(KERN_DEBUG "%s(%p) sk=%p\n", __func__, sock, sk);
 491         if (addr_len != sizeof(struct sockaddr_mISDN))
 492                 return -EINVAL;
 493         if (!maddr || maddr->family != AF_ISDN)
 494                 return -EINVAL;
 495
 496         lock_sock(sk);
 497
 498         if (_pms(sk)->dev) {
 499                 err = -EALREADY;
 500                 goto done;
 501         }
 502         _pms(sk)->dev = get_mdevice(maddr->dev);
 503         if (!_pms(sk)->dev) {
 504                 err = -ENODEV;
 505                 goto done;
 506         }
 507
 508         if (sk->sk_protocol < ISDN_P_B_START) {
 509                 read_lock_bh(&data_sockets.lock);
 510                 sk_for_each(csk, node, &data_sockets.head) {
 511                         if (sk == csk)
 512                                 continue;
 513                         if (_pms(csk)->dev != _pms(sk)->dev)
 514                                 continue;
 515                         if (csk->sk_protocol >= ISDN_P_B_START)
 516                                 continue;
 517                         if (IS_ISDN_P_TE(csk->sk_protocol)
 518                                         == IS_ISDN_P_TE(sk->sk_protocol))
 519                                 continue;
 520                         read_unlock_bh(&data_sockets.lock);
 521                         err = -EBUSY;
 522                         goto done;
 523                 }
 524                 read_unlock_bh(&data_sockets.lock);
 525         }
 526
 527         _pms(sk)->ch.send = mISDN_send;
 528         _pms(sk)->ch.ctrl = mISDN_ctrl;
 529
 530         switch (sk->sk_protocol) {
 531         case ISDN_P_TE_S0:
 532         case ISDN_P_NT_S0:
 533         case ISDN_P_TE_E1:
 534         case ISDN_P_NT_E1:
 535                 mISDN_sock_unlink(&data_sockets, sk);
 536                 err = connect_layer1(_pms(sk)->dev, &_pms(sk)->ch,
 537                     sk->sk_protocol, maddr);
 538                 if (err)
 539                         mISDN_sock_link(&data_sockets, sk);
 540                 break;
 541         case ISDN_P_LAPD_TE:
 542         case ISDN_P_LAPD_NT:
 543                 err = create_l2entity(_pms(sk)->dev, &_pms(sk)->ch,
 544                     sk->sk_protocol, maddr);
 545                 break;
 546         case ISDN_P_B_RAW:
 547         case ISDN_P_B_HDLC:
 548         case ISDN_P_B_X75SLP:
 549         case ISDN_P_B_L2DTMF:
 550         case ISDN_P_B_L2DSP:
 551         case ISDN_P_B_L2DSPHDLC:
 552                 err = connect_Bstack(_pms(sk)->dev, &_pms(sk)->ch,
 553                     sk->sk_protocol, maddr);
 554                 break;
 555         default:
 556                 err = -EPROTONOSUPPORT;
 557         }
 558         if (err)
 559                 goto done;
 560         sk->sk_state = MISDN_BOUND;
 561         _pms(sk)->ch.protocol = sk->sk_protocol;
 562
 563 done:
 564         release_sock(sk);
 565         return err;
 566 }
 567
 568 static int
 569 data_sock_getname(struct socket *sock, struct sockaddr *addr,
 570     int *addr_len, int peer)
 571 {
 572         struct sockaddr_mISDN   *maddr = (struct sockaddr_mISDN *) addr;
 573         struct sock             *sk = sock->sk;
 574
 575         if (!_pms(sk)->dev)
 576                 return -EBADFD;
 577
 578         lock_sock(sk);
 579
 580         *addr_len = sizeof(*maddr);
 581         maddr->dev = _pms(sk)->dev->id;
 582         maddr->channel = _pms(sk)->ch.nr;
 583         maddr->sapi = _pms(sk)->ch.addr & 0xff;
 584         maddr->tei = (_pms(sk)->ch.addr >> 8) & 0xff;
 585         release_sock(sk);
 586         return 0;
 587 }
 588
 589 static const struct proto_ops data_sock_ops = {
 590         .family         = PF_ISDN,
 591         .owner          = THIS_MODULE,
 592         .release        = data_sock_release,
 593         .ioctl          = data_sock_ioctl,
 594         .bind           = data_sock_bind,
 595         .getname        = data_sock_getname,
 596         .sendmsg        = mISDN_sock_sendmsg,
 597         .recvmsg        = mISDN_sock_recvmsg,
 598         .poll           = datagram_poll,
 599         .listen         = sock_no_listen,
 600         .shutdown       = sock_no_shutdown,
 601         .setsockopt     = data_sock_setsockopt,
 602         .getsockopt     = data_sock_getsockopt,
 603         .connect        = sock_no_connect,
 604         .socketpair     = sock_no_socketpair,
 605         .accept         = sock_no_accept,
 606         .mmap           = sock_no_mmap
 607 };
 608
 609 static int
 610 data_sock_create(struct net *net, struct socket *sock, int protocol)
 611 {
 612         struct sock *sk;
 613
 614         if (sock->type != SOCK_DGRAM)
 615                 return -ESOCKTNOSUPPORT;
 616
 617         sk = sk_alloc(net, PF_ISDN, GFP_KERNEL, &mISDN_proto);
 618         if (!sk)
 619                 return -ENOMEM;
 620
 621         sock_init_data(sock, sk);
 622
 623         sock->ops = &data_sock_ops;
 624         sock->state = SS_UNCONNECTED;
 625         sock_reset_flag(sk, SOCK_ZAPPED);
 626
 627         sk->sk_protocol = protocol;
 628         sk->sk_state    = MISDN_OPEN;
 629         mISDN_sock_link(&data_sockets, sk);
 630
 631         return 0;
 632 }
 633
 634 static int
 635 base_sock_release(struct socket *sock)
 636 {
 637         struct sock *sk = sock->sk;
 638
 639         printk(KERN_DEBUG "%s(%p) sk=%p\n", __func__, sock, sk);
 640         if (!sk)
 641                 return 0;
 642
 643         mISDN_sock_unlink(&base_sockets, sk);
 644         sock_orphan(sk);
 645         sock_put(sk);
 646
 647         return 0;
 648 }
 649
 650 static int
 651 base_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
 652 {
 653         int                     err = 0, id;
 654         struct mISDNdevice      *dev;
 655         struct mISDNversion     ver;
 656
 657         switch (cmd) {
 658         case IMGETVERSION:
 659                 ver.major = MISDN_MAJOR_VERSION;
 660                 ver.minor = MISDN_MINOR_VERSION;
 661                 ver.release = MISDN_RELEASE;
 662                 if (copy_to_user((void __user *)arg, &ver, sizeof(ver)))
 663                         err = -EFAULT;
 664                 break;
 665         case IMGETCOUNT:
 666                 id = get_mdevice_count();
 667                 if (put_user(id, (int __user *)arg))
 668                         err = -EFAULT;
 669                 break;
 670         case IMGETDEVINFO:
 671                 if (get_user(id, (int __user *)arg)) {
 672                         err = -EFAULT;
 673                         break;
 674                 }
 675                 dev = get_mdevice(id);
 676                 if (dev) {
 677                         struct mISDN_devinfo di;
 678
 679                         memset(&di, 0, sizeof(di));
 680                         di.id = dev->id;
 681                         di.Dprotocols = dev->Dprotocols;
 682                         di.Bprotocols = dev->Bprotocols | get_all_Bprotocols();
 683                         di.protocol = dev->D.protocol;
 684                         memcpy(di.channelmap, dev->channelmap,
 685                                 sizeof(di.channelmap));
 686                         di.nrbchan = dev->nrbchan;
 687                         strcpy(di.name, dev_name(&dev->dev));
 688                         if (copy_to_user((void __user *)arg, &di, sizeof(di)))
 689                                 err = -EFAULT;
 690                 } else
 691                         err = -ENODEV;
 692                 break;
 693         case IMSETDEVNAME:
 694                 {
 695                         struct mISDN_devrename dn;
 696                         if (copy_from_user(&dn, (void __user *)arg,
 697                             sizeof(dn))) {
 698                                 err = -EFAULT;
 699                                 break;
 700                         }
 701                         dev = get_mdevice(dn.id);
 702                         if (dev)
 703                                 err = device_rename(&dev->dev, dn.name);
 704                         else
 705                                 err = -ENODEV;
 706                 }
 707                 break;
 708         default:
 709                 err = -EINVAL;
 710         }
 711         return err;
 712 }
 713
 714 static int
 715 base_sock_bind(struct socket *sock, struct sockaddr *addr, int addr_len)
 716 {
 717         struct sockaddr_mISDN *maddr = (struct sockaddr_mISDN *) addr;
 718         struct sock *sk = sock->sk;
 719         int err = 0;
 720
 721         if (!maddr || maddr->family != AF_ISDN)
 722                 return -EINVAL;
 723
 724         lock_sock(sk);
 725
 726         if (_pms(sk)->dev) {
 727                 err = -EALREADY;
 728                 goto done;
 729         }
 730
 731         _pms(sk)->dev = get_mdevice(maddr->dev);
 732         if (!_pms(sk)->dev) {
 733                 err = -ENODEV;
 734                 goto done;
 735         }
 736         sk->sk_state = MISDN_BOUND;
 737
 738 done:
 739         release_sock(sk);
 740         return err;
 741 }
 742
 743 static const struct proto_ops base_sock_ops = {
 744         .family         = PF_ISDN,
 745         .owner          = THIS_MODULE,
 746         .release        = base_sock_release,
 747         .ioctl          = base_sock_ioctl,
 748         .bind           = base_sock_bind,
 749         .getname        = sock_no_getname,
 750         .sendmsg        = sock_no_sendmsg,
 751         .recvmsg        = sock_no_recvmsg,
 752         .poll           = sock_no_poll,
 753         .listen         = sock_no_listen,
 754         .shutdown       = sock_no_shutdown,
 755         .setsockopt     = sock_no_setsockopt,
 756         .getsockopt     = sock_no_getsockopt,
 757         .connect        = sock_no_connect,
 758         .socketpair     = sock_no_socketpair,
 759         .accept         = sock_no_accept,
 760         .mmap           = sock_no_mmap
 761 };
 762
 763
 764 static int
 765 base_sock_create(struct net *net, struct socket *sock, int protocol)
 766 {
 767         struct sock *sk;
 768
 769         if (sock->type != SOCK_RAW)
 770                 return -ESOCKTNOSUPPORT;
 771
 772         sk = sk_alloc(net, PF_ISDN, GFP_KERNEL, &mISDN_proto);
 773         if (!sk)
 774                 return -ENOMEM;
 775
 776         sock_init_data(sock, sk);
 777         sock->ops = &base_sock_ops;
 778         sock->state = SS_UNCONNECTED;
 779         sock_reset_flag(sk, SOCK_ZAPPED);
 780         sk->sk_protocol = protocol;
 781         sk->sk_state    = MISDN_OPEN;
 782         mISDN_sock_link(&base_sockets, sk);
 783
 784         return 0;
 785 }
 786
 787 static int
 788 mISDN_sock_create(struct net *net, struct socket *sock, int proto, int kern)
 789 {
 790         int err = -EPROTONOSUPPORT;
 791
 792         switch  (proto) {
 793         case ISDN_P_BASE:
 794                 err = base_sock_create(net, sock, proto);
 795                 break;
 796         case ISDN_P_TE_S0:
 797         case ISDN_P_NT_S0:
 798         case ISDN_P_TE_E1:
 799         case ISDN_P_NT_E1:
 800         case ISDN_P_LAPD_TE:
 801         case ISDN_P_LAPD_NT:
 802         case ISDN_P_B_RAW:
 803         case ISDN_P_B_HDLC:
 804         case ISDN_P_B_X75SLP:
 805         case ISDN_P_B_L2DTMF:
 806         case ISDN_P_B_L2DSP:
 807         case ISDN_P_B_L2DSPHDLC:
 808                 err = data_sock_create(net, sock, proto);
 809                 break;
 810         default:
 811                 return err;
 812         }
 813
 814         return err;
 815 }
 816
 817 static const struct net_proto_family mISDN_sock_family_ops = {
 818         .owner  = THIS_MODULE,
 819         .family = PF_ISDN,
 820         .create = mISDN_sock_create,
 821 };
 822
 823 int
 824 misdn_sock_init(u_int *deb)
 825 {
 826         int err;
 827
 828         debug = deb;
 829         err = sock_register(&mISDN_sock_family_ops);
 830         if (err)
 831                 printk(KERN_ERR "%s: error(%d)\n", __func__, err);
 832         return err;
 833 }
 834
 835 void
 836 misdn_sock_cleanup(void)
 837 {
 838         sock_unregister(PF_ISDN);
 839 }
 840