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