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 } 781 782