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