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 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 atomic_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 if (skb) 240 kfree_skb(skb); 241 release_sock(sk); 242 return err; 243 } 244 245 static int 246 data_sock_release(struct socket *sock) 247 { 248 struct sock *sk = sock->sk; 249 250 if (*debug & DEBUG_SOCKET) 251 printk(KERN_DEBUG "%s(%p) sk=%p\n", __func__, sock, sk); 252 if (!sk) 253 return 0; 254 switch (sk->sk_protocol) { 255 case ISDN_P_TE_S0: 256 case ISDN_P_NT_S0: 257 case ISDN_P_TE_E1: 258 case ISDN_P_NT_E1: 259 if (sk->sk_state == MISDN_BOUND) 260 delete_channel(&_pms(sk)->ch); 261 else 262 mISDN_sock_unlink(&data_sockets, sk); 263 break; 264 case ISDN_P_LAPD_TE: 265 case ISDN_P_LAPD_NT: 266 case ISDN_P_B_RAW: 267 case ISDN_P_B_HDLC: 268 case ISDN_P_B_X75SLP: 269 case ISDN_P_B_L2DTMF: 270 case ISDN_P_B_L2DSP: 271 case ISDN_P_B_L2DSPHDLC: 272 delete_channel(&_pms(sk)->ch); 273 mISDN_sock_unlink(&data_sockets, sk); 274 break; 275 } 276 277 lock_sock(sk); 278 279 sock_orphan(sk); 280 skb_queue_purge(&sk->sk_receive_queue); 281 282 release_sock(sk); 283 sock_put(sk); 284 285 return 0; 286 } 287 288 static int 289 data_sock_ioctl_bound(struct sock *sk, unsigned int cmd, void __user *p) 290 { 291 struct mISDN_ctrl_req cq; 292 int err = -EINVAL, val[2]; 293 struct mISDNchannel *bchan, *next; 294 295 lock_sock(sk); 296 if (!_pms(sk)->dev) { 297 err = -ENODEV; 298 goto done; 299 } 300 switch (cmd) { 301 case IMCTRLREQ: 302 if (copy_from_user(&cq, p, sizeof(cq))) { 303 err = -EFAULT; 304 break; 305 } 306 if ((sk->sk_protocol & ~ISDN_P_B_MASK) == ISDN_P_B_START) { 307 list_for_each_entry_safe(bchan, next, 308 &_pms(sk)->dev->bchannels, list) { 309 if (bchan->nr == cq.channel) { 310 err = bchan->ctrl(bchan, 311 CONTROL_CHANNEL, &cq); 312 break; 313 } 314 } 315 } else 316 err = _pms(sk)->dev->D.ctrl(&_pms(sk)->dev->D, 317 CONTROL_CHANNEL, &cq); 318 if (err) 319 break; 320 if (copy_to_user(p, &cq, sizeof(cq))) 321 err = -EFAULT; 322 break; 323 case IMCLEAR_L2: 324 if (sk->sk_protocol != ISDN_P_LAPD_NT) { 325 err = -EINVAL; 326 break; 327 } 328 val[0] = cmd; 329 if (get_user(val[1], (int __user *)p)) { 330 err = -EFAULT; 331 break; 332 } 333 err = _pms(sk)->dev->teimgr->ctrl(_pms(sk)->dev->teimgr, 334 CONTROL_CHANNEL, val); 335 break; 336 case IMHOLD_L1: 337 if (sk->sk_protocol != ISDN_P_LAPD_NT 338 && sk->sk_protocol != ISDN_P_LAPD_TE) { 339 err = -EINVAL; 340 break; 341 } 342 val[0] = cmd; 343 if (get_user(val[1], (int __user *)p)) { 344 err = -EFAULT; 345 break; 346 } 347 err = _pms(sk)->dev->teimgr->ctrl(_pms(sk)->dev->teimgr, 348 CONTROL_CHANNEL, val); 349 break; 350 default: 351 err = -EINVAL; 352 break; 353 } 354 done: 355 release_sock(sk); 356 return err; 357 } 358 359 static int 360 data_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) 361 { 362 int err = 0, id; 363 struct sock *sk = sock->sk; 364 struct mISDNdevice *dev; 365 struct mISDNversion ver; 366 367 switch (cmd) { 368 case IMGETVERSION: 369 ver.major = MISDN_MAJOR_VERSION; 370 ver.minor = MISDN_MINOR_VERSION; 371 ver.release = MISDN_RELEASE; 372 if (copy_to_user((void __user *)arg, &ver, sizeof(ver))) 373 err = -EFAULT; 374 break; 375 case IMGETCOUNT: 376 id = get_mdevice_count(); 377 if (put_user(id, (int __user *)arg)) 378 err = -EFAULT; 379 break; 380 case IMGETDEVINFO: 381 if (get_user(id, (int __user *)arg)) { 382 err = -EFAULT; 383 break; 384 } 385 dev = get_mdevice(id); 386 if (dev) { 387 struct mISDN_devinfo di; 388 389 memset(&di, 0, sizeof(di)); 390 di.id = dev->id; 391 di.Dprotocols = dev->Dprotocols; 392 di.Bprotocols = dev->Bprotocols | get_all_Bprotocols(); 393 di.protocol = dev->D.protocol; 394 memcpy(di.channelmap, dev->channelmap, 395 sizeof(di.channelmap)); 396 di.nrbchan = dev->nrbchan; 397 strcpy(di.name, dev_name(&dev->dev)); 398 if (copy_to_user((void __user *)arg, &di, sizeof(di))) 399 err = -EFAULT; 400 } else 401 err = -ENODEV; 402 break; 403 default: 404 if (sk->sk_state == MISDN_BOUND) 405 err = data_sock_ioctl_bound(sk, cmd, 406 (void __user *)arg); 407 else 408 err = -ENOTCONN; 409 } 410 return err; 411 } 412 413 static int data_sock_setsockopt(struct socket *sock, int level, int optname, 414 char __user *optval, unsigned int len) 415 { 416 struct sock *sk = sock->sk; 417 int err = 0, opt = 0; 418 419 if (*debug & DEBUG_SOCKET) 420 printk(KERN_DEBUG "%s(%p, %d, %x, %p, %d)\n", __func__, sock, 421 level, optname, optval, len); 422 423 lock_sock(sk); 424 425 switch (optname) { 426 case MISDN_TIME_STAMP: 427 if (get_user(opt, (int __user *)optval)) { 428 err = -EFAULT; 429 break; 430 } 431 432 if (opt) 433 _pms(sk)->cmask |= MISDN_TIME_STAMP; 434 else 435 _pms(sk)->cmask &= ~MISDN_TIME_STAMP; 436 break; 437 default: 438 err = -ENOPROTOOPT; 439 break; 440 } 441 release_sock(sk); 442 return err; 443 } 444 445 static int data_sock_getsockopt(struct socket *sock, int level, int optname, 446 char __user *optval, int __user *optlen) 447 { 448 struct sock *sk = sock->sk; 449 int len, opt; 450 451 if (get_user(len, optlen)) 452 return -EFAULT; 453 454 if (len != sizeof(char)) 455 return -EINVAL; 456 457 switch (optname) { 458 case MISDN_TIME_STAMP: 459 if (_pms(sk)->cmask & MISDN_TIME_STAMP) 460 opt = 1; 461 else 462 opt = 0; 463 464 if (put_user(opt, optval)) 465 return -EFAULT; 466 break; 467 default: 468 return -ENOPROTOOPT; 469 } 470 471 return 0; 472 } 473 474 static int 475 data_sock_bind(struct socket *sock, struct sockaddr *addr, int addr_len) 476 { 477 struct sockaddr_mISDN *maddr = (struct sockaddr_mISDN *) addr; 478 struct sock *sk = sock->sk; 479 struct sock *csk; 480 int err = 0; 481 482 if (*debug & DEBUG_SOCKET) 483 printk(KERN_DEBUG "%s(%p) sk=%p\n", __func__, sock, sk); 484 if (addr_len != sizeof(struct sockaddr_mISDN)) 485 return -EINVAL; 486 if (!maddr || maddr->family != AF_ISDN) 487 return -EINVAL; 488 489 lock_sock(sk); 490 491 if (_pms(sk)->dev) { 492 err = -EALREADY; 493 goto done; 494 } 495 _pms(sk)->dev = get_mdevice(maddr->dev); 496 if (!_pms(sk)->dev) { 497 err = -ENODEV; 498 goto done; 499 } 500 501 if (sk->sk_protocol < ISDN_P_B_START) { 502 read_lock_bh(&data_sockets.lock); 503 sk_for_each(csk, &data_sockets.head) { 504 if (sk == csk) 505 continue; 506 if (_pms(csk)->dev != _pms(sk)->dev) 507 continue; 508 if (csk->sk_protocol >= ISDN_P_B_START) 509 continue; 510 if (IS_ISDN_P_TE(csk->sk_protocol) 511 == IS_ISDN_P_TE(sk->sk_protocol)) 512 continue; 513 read_unlock_bh(&data_sockets.lock); 514 err = -EBUSY; 515 goto done; 516 } 517 read_unlock_bh(&data_sockets.lock); 518 } 519 520 _pms(sk)->ch.send = mISDN_send; 521 _pms(sk)->ch.ctrl = mISDN_ctrl; 522 523 switch (sk->sk_protocol) { 524 case ISDN_P_TE_S0: 525 case ISDN_P_NT_S0: 526 case ISDN_P_TE_E1: 527 case ISDN_P_NT_E1: 528 mISDN_sock_unlink(&data_sockets, sk); 529 err = connect_layer1(_pms(sk)->dev, &_pms(sk)->ch, 530 sk->sk_protocol, maddr); 531 if (err) 532 mISDN_sock_link(&data_sockets, sk); 533 break; 534 case ISDN_P_LAPD_TE: 535 case ISDN_P_LAPD_NT: 536 err = create_l2entity(_pms(sk)->dev, &_pms(sk)->ch, 537 sk->sk_protocol, maddr); 538 break; 539 case ISDN_P_B_RAW: 540 case ISDN_P_B_HDLC: 541 case ISDN_P_B_X75SLP: 542 case ISDN_P_B_L2DTMF: 543 case ISDN_P_B_L2DSP: 544 case ISDN_P_B_L2DSPHDLC: 545 err = connect_Bstack(_pms(sk)->dev, &_pms(sk)->ch, 546 sk->sk_protocol, maddr); 547 break; 548 default: 549 err = -EPROTONOSUPPORT; 550 } 551 if (err) 552 goto done; 553 sk->sk_state = MISDN_BOUND; 554 _pms(sk)->ch.protocol = sk->sk_protocol; 555 556 done: 557 release_sock(sk); 558 return err; 559 } 560 561 static int 562 data_sock_getname(struct socket *sock, struct sockaddr *addr, 563 int *addr_len, int peer) 564 { 565 struct sockaddr_mISDN *maddr = (struct sockaddr_mISDN *) addr; 566 struct sock *sk = sock->sk; 567 568 if (!_pms(sk)->dev) 569 return -EBADFD; 570 571 lock_sock(sk); 572 573 *addr_len = sizeof(*maddr); 574 maddr->family = AF_ISDN; 575 maddr->dev = _pms(sk)->dev->id; 576 maddr->channel = _pms(sk)->ch.nr; 577 maddr->sapi = _pms(sk)->ch.addr & 0xff; 578 maddr->tei = (_pms(sk)->ch.addr >> 8) & 0xff; 579 release_sock(sk); 580 return 0; 581 } 582 583 static const struct proto_ops data_sock_ops = { 584 .family = PF_ISDN, 585 .owner = THIS_MODULE, 586 .release = data_sock_release, 587 .ioctl = data_sock_ioctl, 588 .bind = data_sock_bind, 589 .getname = data_sock_getname, 590 .sendmsg = mISDN_sock_sendmsg, 591 .recvmsg = mISDN_sock_recvmsg, 592 .poll = datagram_poll, 593 .listen = sock_no_listen, 594 .shutdown = sock_no_shutdown, 595 .setsockopt = data_sock_setsockopt, 596 .getsockopt = data_sock_getsockopt, 597 .connect = sock_no_connect, 598 .socketpair = sock_no_socketpair, 599 .accept = sock_no_accept, 600 .mmap = sock_no_mmap 601 }; 602 603 static int 604 data_sock_create(struct net *net, struct socket *sock, int protocol, int kern) 605 { 606 struct sock *sk; 607 608 if (sock->type != SOCK_DGRAM) 609 return -ESOCKTNOSUPPORT; 610 611 sk = sk_alloc(net, PF_ISDN, GFP_KERNEL, &mISDN_proto, kern); 612 if (!sk) 613 return -ENOMEM; 614 615 sock_init_data(sock, sk); 616 617 sock->ops = &data_sock_ops; 618 sock->state = SS_UNCONNECTED; 619 sock_reset_flag(sk, SOCK_ZAPPED); 620 621 sk->sk_protocol = protocol; 622 sk->sk_state = MISDN_OPEN; 623 mISDN_sock_link(&data_sockets, sk); 624 625 return 0; 626 } 627 628 static int 629 base_sock_release(struct socket *sock) 630 { 631 struct sock *sk = sock->sk; 632 633 printk(KERN_DEBUG "%s(%p) sk=%p\n", __func__, sock, sk); 634 if (!sk) 635 return 0; 636 637 mISDN_sock_unlink(&base_sockets, sk); 638 sock_orphan(sk); 639 sock_put(sk); 640 641 return 0; 642 } 643 644 static int 645 base_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) 646 { 647 int err = 0, id; 648 struct mISDNdevice *dev; 649 struct mISDNversion ver; 650 651 switch (cmd) { 652 case IMGETVERSION: 653 ver.major = MISDN_MAJOR_VERSION; 654 ver.minor = MISDN_MINOR_VERSION; 655 ver.release = MISDN_RELEASE; 656 if (copy_to_user((void __user *)arg, &ver, sizeof(ver))) 657 err = -EFAULT; 658 break; 659 case IMGETCOUNT: 660 id = get_mdevice_count(); 661 if (put_user(id, (int __user *)arg)) 662 err = -EFAULT; 663 break; 664 case IMGETDEVINFO: 665 if (get_user(id, (int __user *)arg)) { 666 err = -EFAULT; 667 break; 668 } 669 dev = get_mdevice(id); 670 if (dev) { 671 struct mISDN_devinfo di; 672 673 memset(&di, 0, sizeof(di)); 674 di.id = dev->id; 675 di.Dprotocols = dev->Dprotocols; 676 di.Bprotocols = dev->Bprotocols | get_all_Bprotocols(); 677 di.protocol = dev->D.protocol; 678 memcpy(di.channelmap, dev->channelmap, 679 sizeof(di.channelmap)); 680 di.nrbchan = dev->nrbchan; 681 strcpy(di.name, dev_name(&dev->dev)); 682 if (copy_to_user((void __user *)arg, &di, sizeof(di))) 683 err = -EFAULT; 684 } else 685 err = -ENODEV; 686 break; 687 case IMSETDEVNAME: 688 { 689 struct mISDN_devrename dn; 690 if (copy_from_user(&dn, (void __user *)arg, 691 sizeof(dn))) { 692 err = -EFAULT; 693 break; 694 } 695 dev = get_mdevice(dn.id); 696 if (dev) 697 err = device_rename(&dev->dev, dn.name); 698 else 699 err = -ENODEV; 700 } 701 break; 702 default: 703 err = -EINVAL; 704 } 705 return err; 706 } 707 708 static int 709 base_sock_bind(struct socket *sock, struct sockaddr *addr, int addr_len) 710 { 711 struct sockaddr_mISDN *maddr = (struct sockaddr_mISDN *) addr; 712 struct sock *sk = sock->sk; 713 int err = 0; 714 715 if (!maddr || maddr->family != AF_ISDN) 716 return -EINVAL; 717 718 lock_sock(sk); 719 720 if (_pms(sk)->dev) { 721 err = -EALREADY; 722 goto done; 723 } 724 725 _pms(sk)->dev = get_mdevice(maddr->dev); 726 if (!_pms(sk)->dev) { 727 err = -ENODEV; 728 goto done; 729 } 730 sk->sk_state = MISDN_BOUND; 731 732 done: 733 release_sock(sk); 734 return err; 735 } 736 737 static const struct proto_ops base_sock_ops = { 738 .family = PF_ISDN, 739 .owner = THIS_MODULE, 740 .release = base_sock_release, 741 .ioctl = base_sock_ioctl, 742 .bind = base_sock_bind, 743 .getname = sock_no_getname, 744 .sendmsg = sock_no_sendmsg, 745 .recvmsg = sock_no_recvmsg, 746 .poll = sock_no_poll, 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 } 834