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                         di.id = dev->id;
 396                         di.Dprotocols = dev->Dprotocols;
 397                         di.Bprotocols = dev->Bprotocols | get_all_Bprotocols();
 398                         di.protocol = dev->D.protocol;
 399                         memcpy(di.channelmap, dev->channelmap,
 400                                 sizeof(di.channelmap));
 401                         di.nrbchan = dev->nrbchan;
 402                         strcpy(di.name, dev_name(&dev->dev));
 403                         if (copy_to_user((void __user *)arg, &di, sizeof(di)))
 404                                 err = -EFAULT;
 405                 } else
 406                         err = -ENODEV;
 407                 break;
 408         default:
 409                 if (sk->sk_state == MISDN_BOUND)
 410                         err = data_sock_ioctl_bound(sk, cmd,
 411                                 (void __user *)arg);
 412                 else
 413                         err = -ENOTCONN;
 414         }
 415         return err;
 416 }
 417
 418 static int data_sock_setsockopt(struct socket *sock, int level, int optname,
 419         char __user *optval, unsigned int len)
 420 {
 421         struct sock *sk = sock->sk;
 422         int err = 0, opt = 0;
 423
 424         if (*debug & DEBUG_SOCKET)
 425                 printk(KERN_DEBUG "%s(%p, %d, %x, %p, %d)\n", __func__, sock,
 426                     level, optname, optval, len);
 427
 428         lock_sock(sk);
 429
 430         switch (optname) {
 431         case MISDN_TIME_STAMP:
 432                 if (get_user(opt, (int __user *)optval)) {
 433                         err = -EFAULT;
 434                         break;
 435                 }
 436
 437                 if (opt)
 438                         _pms(sk)->cmask |= MISDN_TIME_STAMP;
 439                 else
 440                         _pms(sk)->cmask &= ~MISDN_TIME_STAMP;
 441                 break;
 442         default:
 443                 err = -ENOPROTOOPT;
 444                 break;
 445         }
 446         release_sock(sk);
 447         return err;
 448 }
 449
 450 static int data_sock_getsockopt(struct socket *sock, int level, int optname,
 451         char __user *optval, int __user *optlen)
 452 {
 453         struct sock *sk = sock->sk;
 454         int len, opt;
 455
 456         if (get_user(len, optlen))
 457                 return -EFAULT;
 458
 459         switch (optname) {
 460         case MISDN_TIME_STAMP:
 461                 if (_pms(sk)->cmask & MISDN_TIME_STAMP)
 462                         opt = 1;
 463                 else
 464                         opt = 0;
 465
 466                 if (put_user(opt, optval))
 467                         return -EFAULT;
 468                 break;
 469         default:
 470                 return -ENOPROTOOPT;
 471         }
 472
 473         return 0;
 474 }
 475
 476 static int
 477 data_sock_bind(struct socket *sock, struct sockaddr *addr, int addr_len)
 478 {
 479         struct sockaddr_mISDN *maddr = (struct sockaddr_mISDN *) addr;
 480         struct sock *sk = sock->sk;
 481         struct hlist_node *node;
 482         struct sock *csk;
 483         int err = 0;
 484
 485         if (*debug & DEBUG_SOCKET)
 486                 printk(KERN_DEBUG "%s(%p) sk=%p\n", __func__, sock, sk);
 487         if (addr_len != sizeof(struct sockaddr_mISDN))
 488                 return -EINVAL;
 489         if (!maddr || maddr->family != AF_ISDN)
 490                 return -EINVAL;
 491
 492         lock_sock(sk);
 493
 494         if (_pms(sk)->dev) {
 495                 err = -EALREADY;
 496                 goto done;
 497         }
 498         _pms(sk)->dev = get_mdevice(maddr->dev);
 499         if (!_pms(sk)->dev) {
 500                 err = -ENODEV;
 501                 goto done;
 502         }
 503
 504         if (sk->sk_protocol < ISDN_P_B_START) {
 505                 read_lock_bh(&data_sockets.lock);
 506                 sk_for_each(csk, node, &data_sockets.head) {
 507                         if (sk == csk)
 508                                 continue;
 509                         if (_pms(csk)->dev != _pms(sk)->dev)
 510                                 continue;
 511                         if (csk->sk_protocol >= ISDN_P_B_START)
 512                                 continue;
 513                         if (IS_ISDN_P_TE(csk->sk_protocol)
 514                                         == IS_ISDN_P_TE(sk->sk_protocol))
 515                                 continue;
 516                         read_unlock_bh(&data_sockets.lock);
 517                         err = -EBUSY;
 518                         goto done;
 519                 }
 520                 read_unlock_bh(&data_sockets.lock);
 521         }
 522
 523         _pms(sk)->ch.send = mISDN_send;
 524         _pms(sk)->ch.ctrl = mISDN_ctrl;
 525
 526         switch (sk->sk_protocol) {
 527         case ISDN_P_TE_S0:
 528         case ISDN_P_NT_S0:
 529         case ISDN_P_TE_E1:
 530         case ISDN_P_NT_E1:
 531                 mISDN_sock_unlink(&data_sockets, sk);
 532                 err = connect_layer1(_pms(sk)->dev, &_pms(sk)->ch,
 533                     sk->sk_protocol, maddr);
 534                 if (err)
 535                         mISDN_sock_link(&data_sockets, sk);
 536                 break;
 537         case ISDN_P_LAPD_TE:
 538         case ISDN_P_LAPD_NT:
 539                 err = create_l2entity(_pms(sk)->dev, &_pms(sk)->ch,
 540                     sk->sk_protocol, maddr);
 541                 break;
 542         case ISDN_P_B_RAW:
 543         case ISDN_P_B_HDLC:
 544         case ISDN_P_B_X75SLP:
 545         case ISDN_P_B_L2DTMF:
 546         case ISDN_P_B_L2DSP:
 547         case ISDN_P_B_L2DSPHDLC:
 548                 err = connect_Bstack(_pms(sk)->dev, &_pms(sk)->ch,
 549                     sk->sk_protocol, maddr);
 550                 break;
 551         default:
 552                 err = -EPROTONOSUPPORT;
 553         }
 554         if (err)
 555                 goto done;
 556         sk->sk_state = MISDN_BOUND;
 557         _pms(sk)->ch.protocol = sk->sk_protocol;
 558
 559 done:
 560         release_sock(sk);
 561         return err;
 562 }
 563
 564 static int
 565 data_sock_getname(struct socket *sock, struct sockaddr *addr,
 566     int *addr_len, int peer)
 567 {
 568         struct sockaddr_mISDN   *maddr = (struct sockaddr_mISDN *) addr;
 569         struct sock             *sk = sock->sk;
 570
 571         if (!_pms(sk)->dev)
 572                 return -EBADFD;
 573
 574         lock_sock(sk);
 575
 576         *addr_len = sizeof(*maddr);
 577         maddr->dev = _pms(sk)->dev->id;
 578         maddr->channel = _pms(sk)->ch.nr;
 579         maddr->sapi = _pms(sk)->ch.addr & 0xff;
 580         maddr->tei = (_pms(sk)->ch.addr >> 8) & 0xff;
 581         release_sock(sk);
 582         return 0;
 583 }
 584
 585 static const struct proto_ops data_sock_ops = {
 586         .family         = PF_ISDN,
 587         .owner          = THIS_MODULE,
 588         .release        = data_sock_release,
 589         .ioctl          = data_sock_ioctl,
 590         .bind           = data_sock_bind,
 591         .getname        = data_sock_getname,
 592         .sendmsg        = mISDN_sock_sendmsg,
 593         .recvmsg        = mISDN_sock_recvmsg,
 594         .poll           = datagram_poll,
 595         .listen         = sock_no_listen,
 596         .shutdown       = sock_no_shutdown,
 597         .setsockopt     = data_sock_setsockopt,
 598         .getsockopt     = data_sock_getsockopt,
 599         .connect        = sock_no_connect,
 600         .socketpair     = sock_no_socketpair,
 601         .accept         = sock_no_accept,
 602         .mmap           = sock_no_mmap
 603 };
 604
 605 static int
 606 data_sock_create(struct net *net, struct socket *sock, int protocol)
 607 {
 608         struct sock *sk;
 609
 610         if (sock->type != SOCK_DGRAM)
 611                 return -ESOCKTNOSUPPORT;
 612
 613         sk = sk_alloc(net, PF_ISDN, GFP_KERNEL, &mISDN_proto);
 614         if (!sk)
 615                 return -ENOMEM;
 616
 617         sock_init_data(sock, sk);
 618
 619         sock->ops = &data_sock_ops;
 620         sock->state = SS_UNCONNECTED;
 621         sock_reset_flag(sk, SOCK_ZAPPED);
 622
 623         sk->sk_protocol = protocol;
 624         sk->sk_state    = MISDN_OPEN;
 625         mISDN_sock_link(&data_sockets, sk);
 626
 627         return 0;
 628 }
 629
 630 static int
 631 base_sock_release(struct socket *sock)
 632 {
 633         struct sock *sk = sock->sk;
 634
 635         printk(KERN_DEBUG "%s(%p) sk=%p\n", __func__, sock, sk);
 636         if (!sk)
 637                 return 0;
 638
 639         mISDN_sock_unlink(&base_sockets, sk);
 640         sock_orphan(sk);
 641         sock_put(sk);
 642
 643         return 0;
 644 }
 645
 646 static int
 647 base_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
 648 {
 649         int                     err = 0, id;
 650         struct mISDNdevice      *dev;
 651         struct mISDNversion     ver;
 652
 653         switch (cmd) {
 654         case IMGETVERSION:
 655                 ver.major = MISDN_MAJOR_VERSION;
 656                 ver.minor = MISDN_MINOR_VERSION;
 657                 ver.release = MISDN_RELEASE;
 658                 if (copy_to_user((void __user *)arg, &ver, sizeof(ver)))
 659                         err = -EFAULT;
 660                 break;
 661         case IMGETCOUNT:
 662                 id = get_mdevice_count();
 663                 if (put_user(id, (int __user *)arg))
 664                         err = -EFAULT;
 665                 break;
 666         case IMGETDEVINFO:
 667                 if (get_user(id, (int __user *)arg)) {
 668                         err = -EFAULT;
 669                         break;
 670                 }
 671                 dev = get_mdevice(id);
 672                 if (dev) {
 673                         struct mISDN_devinfo di;
 674
 675                         di.id = dev->id;
 676                         di.Dprotocols = dev->Dprotocols;
 677                         di.Bprotocols = dev->Bprotocols | get_all_Bprotocols();
 678                         di.protocol = dev->D.protocol;
 679                         memcpy(di.channelmap, dev->channelmap,
 680                                 sizeof(di.channelmap));
 681                         di.nrbchan = dev->nrbchan;
 682                         strcpy(di.name, dev_name(&dev->dev));
 683                         if (copy_to_user((void __user *)arg, &di, sizeof(di)))
 684                                 err = -EFAULT;
 685                 } else
 686                         err = -ENODEV;
 687                 break;
 688         case IMSETDEVNAME:
 689                 {
 690                         struct mISDN_devrename dn;
 691                         if (copy_from_user(&dn, (void __user *)arg,
 692                             sizeof(dn))) {
 693                                 err = -EFAULT;
 694                                 break;
 695                         }
 696                         dev = get_mdevice(dn.id);
 697                         if (dev)
 698                                 err = device_rename(&dev->dev, dn.name);
 699                         else
 700                                 err = -ENODEV;
 701                 }
 702                 break;
 703         default:
 704                 err = -EINVAL;
 705         }
 706         return err;
 707 }
 708
 709 static int
 710 base_sock_bind(struct socket *sock, struct sockaddr *addr, int addr_len)
 711 {
 712         struct sockaddr_mISDN *maddr = (struct sockaddr_mISDN *) addr;
 713         struct sock *sk = sock->sk;
 714         int err = 0;
 715
 716         if (!maddr || maddr->family != AF_ISDN)
 717                 return -EINVAL;
 718
 719         lock_sock(sk);
 720
 721         if (_pms(sk)->dev) {
 722                 err = -EALREADY;
 723                 goto done;
 724         }
 725
 726         _pms(sk)->dev = get_mdevice(maddr->dev);
 727         if (!_pms(sk)->dev) {
 728                 err = -ENODEV;
 729                 goto done;
 730         }
 731         sk->sk_state = MISDN_BOUND;
 732
 733 done:
 734         release_sock(sk);
 735         return err;
 736 }
 737
 738 static const struct proto_ops base_sock_ops = {
 739         .family         = PF_ISDN,
 740         .owner          = THIS_MODULE,
 741         .release        = base_sock_release,
 742         .ioctl          = base_sock_ioctl,
 743         .bind           = base_sock_bind,
 744         .getname        = sock_no_getname,
 745         .sendmsg        = sock_no_sendmsg,
 746         .recvmsg        = sock_no_recvmsg,
 747         .poll           = sock_no_poll,
 748         .listen         = sock_no_listen,
 749         .shutdown       = sock_no_shutdown,
 750         .setsockopt     = sock_no_setsockopt,
 751         .getsockopt     = sock_no_getsockopt,
 752         .connect        = sock_no_connect,
 753         .socketpair     = sock_no_socketpair,
 754         .accept         = sock_no_accept,
 755         .mmap           = sock_no_mmap
 756 };
 757
 758
 759 static int
 760 base_sock_create(struct net *net, struct socket *sock, int protocol)
 761 {
 762         struct sock *sk;
 763
 764         if (sock->type != SOCK_RAW)
 765                 return -ESOCKTNOSUPPORT;
 766
 767         sk = sk_alloc(net, PF_ISDN, GFP_KERNEL, &mISDN_proto);
 768         if (!sk)
 769                 return -ENOMEM;
 770
 771         sock_init_data(sock, sk);
 772         sock->ops = &base_sock_ops;
 773         sock->state = SS_UNCONNECTED;
 774         sock_reset_flag(sk, SOCK_ZAPPED);
 775         sk->sk_protocol = protocol;
 776         sk->sk_state    = MISDN_OPEN;
 777         mISDN_sock_link(&base_sockets, sk);
 778
 779         return 0;
 780 }
 781
 782 static int
 783 mISDN_sock_create(struct net *net, struct socket *sock, int proto, int kern)
 784 {
 785         int err = -EPROTONOSUPPORT;
 786
 787         switch  (proto) {
 788         case ISDN_P_BASE:
 789                 err = base_sock_create(net, sock, proto);
 790                 break;
 791         case ISDN_P_TE_S0:
 792         case ISDN_P_NT_S0:
 793         case ISDN_P_TE_E1:
 794         case ISDN_P_NT_E1:
 795         case ISDN_P_LAPD_TE:
 796         case ISDN_P_LAPD_NT:
 797         case ISDN_P_B_RAW:
 798         case ISDN_P_B_HDLC:
 799         case ISDN_P_B_X75SLP:
 800         case ISDN_P_B_L2DTMF:
 801         case ISDN_P_B_L2DSP:
 802         case ISDN_P_B_L2DSPHDLC:
 803                 err = data_sock_create(net, sock, proto);
 804                 break;
 805         default:
 806                 return err;
 807         }
 808
 809         return err;
 810 }
 811
 812 static const struct net_proto_family mISDN_sock_family_ops = {
 813         .owner  = THIS_MODULE,
 814         .family = PF_ISDN,
 815         .create = mISDN_sock_create,
 816 };
 817
 818 int
 819 misdn_sock_init(u_int *deb)
 820 {
 821         int err;
 822
 823         debug = deb;
 824         err = sock_register(&mISDN_sock_family_ops);
 825         if (err)
 826                 printk(KERN_ERR "%s: error(%d)\n", __func__, err);
 827         return err;
 828 }
 829
 830 void
 831 misdn_sock_cleanup(void)
 832 {
 833         sock_unregister(PF_ISDN);
 834 }
 835