1 /* 2 * 3 * Author Karsten Keil <kkeil@novell.com> 4 * 5 * Copyright 2008 by Karsten Keil <kkeil@novell.com> 6 * 7 * This program is free software; you can redistribute it and/or modify 8 * it under the terms of the GNU General Public License version 2 as 9 * published by the Free Software Foundation. 10 * 11 * This program is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * GNU General Public License for more details. 15 * 16 */ 17 18 #include <linux/mISDNif.h> 19 #include <linux/slab.h> 20 #include "core.h" 21 22 static u_int *debug; 23 24 static struct proto mISDN_proto = { 25 .name = "misdn", 26 .owner = THIS_MODULE, 27 .obj_size = sizeof(struct mISDN_sock) 28 }; 29 30 #define _pms(sk) ((struct mISDN_sock *)sk) 31 32 static struct mISDN_sock_list data_sockets = { 33 .lock = __RW_LOCK_UNLOCKED(data_sockets.lock) 34 }; 35 36 static struct mISDN_sock_list base_sockets = { 37 .lock = __RW_LOCK_UNLOCKED(base_sockets.lock) 38 }; 39 40 #define L2_HEADER_LEN 4 41 42 static inline struct sk_buff * 43 _l2_alloc_skb(unsigned int len, gfp_t gfp_mask) 44 { 45 struct sk_buff *skb; 46 47 skb = alloc_skb(len + L2_HEADER_LEN, gfp_mask); 48 if (likely(skb)) 49 skb_reserve(skb, L2_HEADER_LEN); 50 return skb; 51 } 52 53 static void 54 mISDN_sock_link(struct mISDN_sock_list *l, struct sock *sk) 55 { 56 write_lock_bh(&l->lock); 57 sk_add_node(sk, &l->head); 58 write_unlock_bh(&l->lock); 59 } 60 61 static void mISDN_sock_unlink(struct mISDN_sock_list *l, struct sock *sk) 62 { 63 write_lock_bh(&l->lock); 64 sk_del_node_init(sk); 65 write_unlock_bh(&l->lock); 66 } 67 68 static int 69 mISDN_send(struct mISDNchannel *ch, struct sk_buff *skb) 70 { 71 struct mISDN_sock *msk; 72 int err; 73 74 msk = container_of(ch, struct mISDN_sock, ch); 75 if (*debug & DEBUG_SOCKET) 76 printk(KERN_DEBUG "%s len %d %p\n", __func__, skb->len, skb); 77 if (msk->sk.sk_state == MISDN_CLOSED) 78 return -EUNATCH; 79 __net_timestamp(skb); 80 err = sock_queue_rcv_skb(&msk->sk, skb); 81 if (err) 82 printk(KERN_WARNING "%s: error %d\n", __func__, err); 83 return err; 84 } 85 86 static int 87 mISDN_ctrl(struct mISDNchannel *ch, u_int cmd, void *arg) 88 { 89 struct mISDN_sock *msk; 90 91 msk = container_of(ch, struct mISDN_sock, ch); 92 if (*debug & DEBUG_SOCKET) 93 printk(KERN_DEBUG "%s(%p, %x, %p)\n", __func__, ch, cmd, arg); 94 switch (cmd) { 95 case CLOSE_CHANNEL: 96 msk->sk.sk_state = MISDN_CLOSED; 97 break; 98 } 99 return 0; 100 } 101 102 static inline void 103 mISDN_sock_cmsg(struct sock *sk, struct msghdr *msg, struct sk_buff *skb) 104 { 105 struct timeval tv; 106 107 if (_pms(sk)->cmask & MISDN_TIME_STAMP) { 108 skb_get_timestamp(skb, &tv); 109 put_cmsg(msg, SOL_MISDN, MISDN_TIME_STAMP, sizeof(tv), &tv); 110 } 111 } 112 113 static int 114 mISDN_sock_recvmsg(struct kiocb *iocb, struct socket *sock, 115 struct msghdr *msg, size_t len, int flags) 116 { 117 struct sk_buff *skb; 118 struct sock *sk = sock->sk; 119 struct sockaddr_mISDN *maddr; 120 121 int copied, err; 122 123 if (*debug & DEBUG_SOCKET) 124 printk(KERN_DEBUG "%s: len %d, flags %x ch.nr %d, proto %x\n", 125 __func__, (int)len, flags, _pms(sk)->ch.nr, 126 sk->sk_protocol); 127 if (flags & (MSG_OOB)) 128 return -EOPNOTSUPP; 129 130 if (sk->sk_state == MISDN_CLOSED) 131 return 0; 132 133 skb = skb_recv_datagram(sk, flags, flags & MSG_DONTWAIT, &err); 134 if (!skb) 135 return err; 136 137 if (msg->msg_namelen >= sizeof(struct sockaddr_mISDN)) { 138 msg->msg_namelen = sizeof(struct sockaddr_mISDN); 139 maddr = (struct sockaddr_mISDN *)msg->msg_name; 140 maddr->family = AF_ISDN; 141 maddr->dev = _pms(sk)->dev->id; 142 if ((sk->sk_protocol == ISDN_P_LAPD_TE) || 143 (sk->sk_protocol == ISDN_P_LAPD_NT)) { 144 maddr->channel = (mISDN_HEAD_ID(skb) >> 16) & 0xff; 145 maddr->tei = (mISDN_HEAD_ID(skb) >> 8) & 0xff; 146 maddr->sapi = mISDN_HEAD_ID(skb) & 0xff; 147 } else { 148 maddr->channel = _pms(sk)->ch.nr; 149 maddr->sapi = _pms(sk)->ch.addr & 0xFF; 150 maddr->tei = (_pms(sk)->ch.addr >> 8) & 0xFF; 151 } 152 } else { 153 if (msg->msg_namelen) 154 printk(KERN_WARNING "%s: too small namelen %d\n", 155 __func__, msg->msg_namelen); 156 msg->msg_namelen = 0; 157 } 158 159 copied = skb->len + MISDN_HEADER_LEN; 160 if (len < copied) { 161 if (flags & MSG_PEEK) 162 atomic_dec(&skb->users); 163 else 164 skb_queue_head(&sk->sk_receive_queue, skb); 165 return -ENOSPC; 166 } 167 memcpy(skb_push(skb, MISDN_HEADER_LEN), mISDN_HEAD_P(skb), 168 MISDN_HEADER_LEN); 169 170 err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied); 171 172 mISDN_sock_cmsg(sk, msg, skb); 173 174 skb_free_datagram(sk, skb); 175 176 return err ? : copied; 177 } 178 179 static int 180 mISDN_sock_sendmsg(struct kiocb *iocb, struct socket *sock, 181 struct msghdr *msg, size_t len) 182 { 183 struct sock *sk = sock->sk; 184 struct sk_buff *skb; 185 int err = -ENOMEM; 186 struct sockaddr_mISDN *maddr; 187 188 if (*debug & DEBUG_SOCKET) 189 printk(KERN_DEBUG "%s: len %d flags %x ch %d proto %x\n", 190 __func__, (int)len, msg->msg_flags, _pms(sk)->ch.nr, 191 sk->sk_protocol); 192 193 if (msg->msg_flags & MSG_OOB) 194 return -EOPNOTSUPP; 195 196 if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_NOSIGNAL|MSG_ERRQUEUE)) 197 return -EINVAL; 198 199 if (len < MISDN_HEADER_LEN) 200 return -EINVAL; 201 202 if (sk->sk_state != MISDN_BOUND) 203 return -EBADFD; 204 205 lock_sock(sk); 206 207 skb = _l2_alloc_skb(len, GFP_KERNEL); 208 if (!skb) 209 goto done; 210 211 if (memcpy_fromiovec(skb_put(skb, len), msg->msg_iov, len)) { 212 err = -EFAULT; 213 goto done; 214 } 215 216 memcpy(mISDN_HEAD_P(skb), skb->data, MISDN_HEADER_LEN); 217 skb_pull(skb, MISDN_HEADER_LEN); 218 219 if (msg->msg_namelen >= sizeof(struct sockaddr_mISDN)) { 220 /* if we have a address, we use it */ 221 maddr = (struct sockaddr_mISDN *)msg->msg_name; 222 mISDN_HEAD_ID(skb) = maddr->channel; 223 } else { /* use default for L2 messages */ 224 if ((sk->sk_protocol == ISDN_P_LAPD_TE) || 225 (sk->sk_protocol == ISDN_P_LAPD_NT)) 226 mISDN_HEAD_ID(skb) = _pms(sk)->ch.nr; 227 } 228 229 if (*debug & DEBUG_SOCKET) 230 printk(KERN_DEBUG "%s: ID:%x\n", 231 __func__, mISDN_HEAD_ID(skb)); 232 233 err = -ENODEV; 234 if (!_pms(sk)->ch.peer) 235 goto done; 236 err = _pms(sk)->ch.recv(_pms(sk)->ch.peer, skb); 237 if (err) 238 goto done; 239 else { 240 skb = NULL; 241 err = len; 242 } 243 244 done: 245 if (skb) 246 kfree_skb(skb); 247 release_sock(sk); 248 return err; 249 } 250 251 static int 252 data_sock_release(struct socket *sock) 253 { 254 struct sock *sk = sock->sk; 255 256 if (*debug & DEBUG_SOCKET) 257 printk(KERN_DEBUG "%s(%p) sk=%p\n", __func__, sock, sk); 258 if (!sk) 259 return 0; 260 switch (sk->sk_protocol) { 261 case ISDN_P_TE_S0: 262 case ISDN_P_NT_S0: 263 case ISDN_P_TE_E1: 264 case ISDN_P_NT_E1: 265 if (sk->sk_state == MISDN_BOUND) 266 delete_channel(&_pms(sk)->ch); 267 else 268 mISDN_sock_unlink(&data_sockets, sk); 269 break; 270 case ISDN_P_LAPD_TE: 271 case ISDN_P_LAPD_NT: 272 case ISDN_P_B_RAW: 273 case ISDN_P_B_HDLC: 274 case ISDN_P_B_X75SLP: 275 case ISDN_P_B_L2DTMF: 276 case ISDN_P_B_L2DSP: 277 case ISDN_P_B_L2DSPHDLC: 278 delete_channel(&_pms(sk)->ch); 279 mISDN_sock_unlink(&data_sockets, sk); 280 break; 281 } 282 283 lock_sock(sk); 284 285 sock_orphan(sk); 286 skb_queue_purge(&sk->sk_receive_queue); 287 288 release_sock(sk); 289 sock_put(sk); 290 291 return 0; 292 } 293 294 static int 295 data_sock_ioctl_bound(struct sock *sk, unsigned int cmd, void __user *p) 296 { 297 struct mISDN_ctrl_req cq; 298 int err = -EINVAL, val[2]; 299 struct mISDNchannel *bchan, *next; 300 301 lock_sock(sk); 302 if (!_pms(sk)->dev) { 303 err = -ENODEV; 304 goto done; 305 } 306 switch (cmd) { 307 case IMCTRLREQ: 308 if (copy_from_user(&cq, p, sizeof(cq))) { 309 err = -EFAULT; 310 break; 311 } 312 if ((sk->sk_protocol & ~ISDN_P_B_MASK) == ISDN_P_B_START) { 313 list_for_each_entry_safe(bchan, next, 314 &_pms(sk)->dev->bchannels, list) { 315 if (bchan->nr == cq.channel) { 316 err = bchan->ctrl(bchan, 317 CONTROL_CHANNEL, &cq); 318 break; 319 } 320 } 321 } else 322 err = _pms(sk)->dev->D.ctrl(&_pms(sk)->dev->D, 323 CONTROL_CHANNEL, &cq); 324 if (err) 325 break; 326 if (copy_to_user(p, &cq, sizeof(cq))) 327 err = -EFAULT; 328 break; 329 case IMCLEAR_L2: 330 if (sk->sk_protocol != ISDN_P_LAPD_NT) { 331 err = -EINVAL; 332 break; 333 } 334 val[0] = cmd; 335 if (get_user(val[1], (int __user *)p)) { 336 err = -EFAULT; 337 break; 338 } 339 err = _pms(sk)->dev->teimgr->ctrl(_pms(sk)->dev->teimgr, 340 CONTROL_CHANNEL, val); 341 break; 342 case IMHOLD_L1: 343 if (sk->sk_protocol != ISDN_P_LAPD_NT 344 && sk->sk_protocol != ISDN_P_LAPD_TE) { 345 err = -EINVAL; 346 break; 347 } 348 val[0] = cmd; 349 if (get_user(val[1], (int __user *)p)) { 350 err = -EFAULT; 351 break; 352 } 353 err = _pms(sk)->dev->teimgr->ctrl(_pms(sk)->dev->teimgr, 354 CONTROL_CHANNEL, val); 355 break; 356 default: 357 err = -EINVAL; 358 break; 359 } 360 done: 361 release_sock(sk); 362 return err; 363 } 364 365 static int 366 data_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) 367 { 368 int err = 0, id; 369 struct sock *sk = sock->sk; 370 struct mISDNdevice *dev; 371 struct mISDNversion ver; 372 373 switch (cmd) { 374 case IMGETVERSION: 375 ver.major = MISDN_MAJOR_VERSION; 376 ver.minor = MISDN_MINOR_VERSION; 377 ver.release = MISDN_RELEASE; 378 if (copy_to_user((void __user *)arg, &ver, sizeof(ver))) 379 err = -EFAULT; 380 break; 381 case IMGETCOUNT: 382 id = get_mdevice_count(); 383 if (put_user(id, (int __user *)arg)) 384 err = -EFAULT; 385 break; 386 case IMGETDEVINFO: 387 if (get_user(id, (int __user *)arg)) { 388 err = -EFAULT; 389 break; 390 } 391 dev = get_mdevice(id); 392 if (dev) { 393 struct mISDN_devinfo di; 394 395 di.id = dev->id; 396 di.Dprotocols = dev->Dprotocols; 397 di.Bprotocols = dev->Bprotocols | get_all_Bprotocols(); 398 di.protocol = dev->D.protocol; 399 memcpy(di.channelmap, dev->channelmap, 400 sizeof(di.channelmap)); 401 di.nrbchan = dev->nrbchan; 402 strcpy(di.name, dev_name(&dev->dev)); 403 if (copy_to_user((void __user *)arg, &di, sizeof(di))) 404 err = -EFAULT; 405 } else 406 err = -ENODEV; 407 break; 408 default: 409 if (sk->sk_state == MISDN_BOUND) 410 err = data_sock_ioctl_bound(sk, cmd, 411 (void __user *)arg); 412 else 413 err = -ENOTCONN; 414 } 415 return err; 416 } 417 418 static int data_sock_setsockopt(struct socket *sock, int level, int optname, 419 char __user *optval, unsigned int len) 420 { 421 struct sock *sk = sock->sk; 422 int err = 0, opt = 0; 423 424 if (*debug & DEBUG_SOCKET) 425 printk(KERN_DEBUG "%s(%p, %d, %x, %p, %d)\n", __func__, sock, 426 level, optname, optval, len); 427 428 lock_sock(sk); 429 430 switch (optname) { 431 case MISDN_TIME_STAMP: 432 if (get_user(opt, (int __user *)optval)) { 433 err = -EFAULT; 434 break; 435 } 436 437 if (opt) 438 _pms(sk)->cmask |= MISDN_TIME_STAMP; 439 else 440 _pms(sk)->cmask &= ~MISDN_TIME_STAMP; 441 break; 442 default: 443 err = -ENOPROTOOPT; 444 break; 445 } 446 release_sock(sk); 447 return err; 448 } 449 450 static int data_sock_getsockopt(struct socket *sock, int level, int optname, 451 char __user *optval, int __user *optlen) 452 { 453 struct sock *sk = sock->sk; 454 int len, opt; 455 456 if (get_user(len, optlen)) 457 return -EFAULT; 458 459 switch (optname) { 460 case MISDN_TIME_STAMP: 461 if (_pms(sk)->cmask & MISDN_TIME_STAMP) 462 opt = 1; 463 else 464 opt = 0; 465 466 if (put_user(opt, optval)) 467 return -EFAULT; 468 break; 469 default: 470 return -ENOPROTOOPT; 471 } 472 473 return 0; 474 } 475 476 static int 477 data_sock_bind(struct socket *sock, struct sockaddr *addr, int addr_len) 478 { 479 struct sockaddr_mISDN *maddr = (struct sockaddr_mISDN *) addr; 480 struct sock *sk = sock->sk; 481 struct hlist_node *node; 482 struct sock *csk; 483 int err = 0; 484 485 if (*debug & DEBUG_SOCKET) 486 printk(KERN_DEBUG "%s(%p) sk=%p\n", __func__, sock, sk); 487 if (addr_len != sizeof(struct sockaddr_mISDN)) 488 return -EINVAL; 489 if (!maddr || maddr->family != AF_ISDN) 490 return -EINVAL; 491 492 lock_sock(sk); 493 494 if (_pms(sk)->dev) { 495 err = -EALREADY; 496 goto done; 497 } 498 _pms(sk)->dev = get_mdevice(maddr->dev); 499 if (!_pms(sk)->dev) { 500 err = -ENODEV; 501 goto done; 502 } 503 504 if (sk->sk_protocol < ISDN_P_B_START) { 505 read_lock_bh(&data_sockets.lock); 506 sk_for_each(csk, node, &data_sockets.head) { 507 if (sk == csk) 508 continue; 509 if (_pms(csk)->dev != _pms(sk)->dev) 510 continue; 511 if (csk->sk_protocol >= ISDN_P_B_START) 512 continue; 513 if (IS_ISDN_P_TE(csk->sk_protocol) 514 == IS_ISDN_P_TE(sk->sk_protocol)) 515 continue; 516 read_unlock_bh(&data_sockets.lock); 517 err = -EBUSY; 518 goto done; 519 } 520 read_unlock_bh(&data_sockets.lock); 521 } 522 523 _pms(sk)->ch.send = mISDN_send; 524 _pms(sk)->ch.ctrl = mISDN_ctrl; 525 526 switch (sk->sk_protocol) { 527 case ISDN_P_TE_S0: 528 case ISDN_P_NT_S0: 529 case ISDN_P_TE_E1: 530 case ISDN_P_NT_E1: 531 mISDN_sock_unlink(&data_sockets, sk); 532 err = connect_layer1(_pms(sk)->dev, &_pms(sk)->ch, 533 sk->sk_protocol, maddr); 534 if (err) 535 mISDN_sock_link(&data_sockets, sk); 536 break; 537 case ISDN_P_LAPD_TE: 538 case ISDN_P_LAPD_NT: 539 err = create_l2entity(_pms(sk)->dev, &_pms(sk)->ch, 540 sk->sk_protocol, maddr); 541 break; 542 case ISDN_P_B_RAW: 543 case ISDN_P_B_HDLC: 544 case ISDN_P_B_X75SLP: 545 case ISDN_P_B_L2DTMF: 546 case ISDN_P_B_L2DSP: 547 case ISDN_P_B_L2DSPHDLC: 548 err = connect_Bstack(_pms(sk)->dev, &_pms(sk)->ch, 549 sk->sk_protocol, maddr); 550 break; 551 default: 552 err = -EPROTONOSUPPORT; 553 } 554 if (err) 555 goto done; 556 sk->sk_state = MISDN_BOUND; 557 _pms(sk)->ch.protocol = sk->sk_protocol; 558 559 done: 560 release_sock(sk); 561 return err; 562 } 563 564 static int 565 data_sock_getname(struct socket *sock, struct sockaddr *addr, 566 int *addr_len, int peer) 567 { 568 struct sockaddr_mISDN *maddr = (struct sockaddr_mISDN *) addr; 569 struct sock *sk = sock->sk; 570 571 if (!_pms(sk)->dev) 572 return -EBADFD; 573 574 lock_sock(sk); 575 576 *addr_len = sizeof(*maddr); 577 maddr->dev = _pms(sk)->dev->id; 578 maddr->channel = _pms(sk)->ch.nr; 579 maddr->sapi = _pms(sk)->ch.addr & 0xff; 580 maddr->tei = (_pms(sk)->ch.addr >> 8) & 0xff; 581 release_sock(sk); 582 return 0; 583 } 584 585 static const struct proto_ops data_sock_ops = { 586 .family = PF_ISDN, 587 .owner = THIS_MODULE, 588 .release = data_sock_release, 589 .ioctl = data_sock_ioctl, 590 .bind = data_sock_bind, 591 .getname = data_sock_getname, 592 .sendmsg = mISDN_sock_sendmsg, 593 .recvmsg = mISDN_sock_recvmsg, 594 .poll = datagram_poll, 595 .listen = sock_no_listen, 596 .shutdown = sock_no_shutdown, 597 .setsockopt = data_sock_setsockopt, 598 .getsockopt = data_sock_getsockopt, 599 .connect = sock_no_connect, 600 .socketpair = sock_no_socketpair, 601 .accept = sock_no_accept, 602 .mmap = sock_no_mmap 603 }; 604 605 static int 606 data_sock_create(struct net *net, struct socket *sock, int protocol) 607 { 608 struct sock *sk; 609 610 if (sock->type != SOCK_DGRAM) 611 return -ESOCKTNOSUPPORT; 612 613 sk = sk_alloc(net, PF_ISDN, GFP_KERNEL, &mISDN_proto); 614 if (!sk) 615 return -ENOMEM; 616 617 sock_init_data(sock, sk); 618 619 sock->ops = &data_sock_ops; 620 sock->state = SS_UNCONNECTED; 621 sock_reset_flag(sk, SOCK_ZAPPED); 622 623 sk->sk_protocol = protocol; 624 sk->sk_state = MISDN_OPEN; 625 mISDN_sock_link(&data_sockets, sk); 626 627 return 0; 628 } 629 630 static int 631 base_sock_release(struct socket *sock) 632 { 633 struct sock *sk = sock->sk; 634 635 printk(KERN_DEBUG "%s(%p) sk=%p\n", __func__, sock, sk); 636 if (!sk) 637 return 0; 638 639 mISDN_sock_unlink(&base_sockets, sk); 640 sock_orphan(sk); 641 sock_put(sk); 642 643 return 0; 644 } 645 646 static int 647 base_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) 648 { 649 int err = 0, id; 650 struct mISDNdevice *dev; 651 struct mISDNversion ver; 652 653 switch (cmd) { 654 case IMGETVERSION: 655 ver.major = MISDN_MAJOR_VERSION; 656 ver.minor = MISDN_MINOR_VERSION; 657 ver.release = MISDN_RELEASE; 658 if (copy_to_user((void __user *)arg, &ver, sizeof(ver))) 659 err = -EFAULT; 660 break; 661 case IMGETCOUNT: 662 id = get_mdevice_count(); 663 if (put_user(id, (int __user *)arg)) 664 err = -EFAULT; 665 break; 666 case IMGETDEVINFO: 667 if (get_user(id, (int __user *)arg)) { 668 err = -EFAULT; 669 break; 670 } 671 dev = get_mdevice(id); 672 if (dev) { 673 struct mISDN_devinfo di; 674 675 di.id = dev->id; 676 di.Dprotocols = dev->Dprotocols; 677 di.Bprotocols = dev->Bprotocols | get_all_Bprotocols(); 678 di.protocol = dev->D.protocol; 679 memcpy(di.channelmap, dev->channelmap, 680 sizeof(di.channelmap)); 681 di.nrbchan = dev->nrbchan; 682 strcpy(di.name, dev_name(&dev->dev)); 683 if (copy_to_user((void __user *)arg, &di, sizeof(di))) 684 err = -EFAULT; 685 } else 686 err = -ENODEV; 687 break; 688 case IMSETDEVNAME: 689 { 690 struct mISDN_devrename dn; 691 if (copy_from_user(&dn, (void __user *)arg, 692 sizeof(dn))) { 693 err = -EFAULT; 694 break; 695 } 696 dev = get_mdevice(dn.id); 697 if (dev) 698 err = device_rename(&dev->dev, dn.name); 699 else 700 err = -ENODEV; 701 } 702 break; 703 default: 704 err = -EINVAL; 705 } 706 return err; 707 } 708 709 static int 710 base_sock_bind(struct socket *sock, struct sockaddr *addr, int addr_len) 711 { 712 struct sockaddr_mISDN *maddr = (struct sockaddr_mISDN *) addr; 713 struct sock *sk = sock->sk; 714 int err = 0; 715 716 if (!maddr || maddr->family != AF_ISDN) 717 return -EINVAL; 718 719 lock_sock(sk); 720 721 if (_pms(sk)->dev) { 722 err = -EALREADY; 723 goto done; 724 } 725 726 _pms(sk)->dev = get_mdevice(maddr->dev); 727 if (!_pms(sk)->dev) { 728 err = -ENODEV; 729 goto done; 730 } 731 sk->sk_state = MISDN_BOUND; 732 733 done: 734 release_sock(sk); 735 return err; 736 } 737 738 static const struct proto_ops base_sock_ops = { 739 .family = PF_ISDN, 740 .owner = THIS_MODULE, 741 .release = base_sock_release, 742 .ioctl = base_sock_ioctl, 743 .bind = base_sock_bind, 744 .getname = sock_no_getname, 745 .sendmsg = sock_no_sendmsg, 746 .recvmsg = sock_no_recvmsg, 747 .poll = sock_no_poll, 748 .listen = sock_no_listen, 749 .shutdown = sock_no_shutdown, 750 .setsockopt = sock_no_setsockopt, 751 .getsockopt = sock_no_getsockopt, 752 .connect = sock_no_connect, 753 .socketpair = sock_no_socketpair, 754 .accept = sock_no_accept, 755 .mmap = sock_no_mmap 756 }; 757 758 759 static int 760 base_sock_create(struct net *net, struct socket *sock, int protocol) 761 { 762 struct sock *sk; 763 764 if (sock->type != SOCK_RAW) 765 return -ESOCKTNOSUPPORT; 766 767 sk = sk_alloc(net, PF_ISDN, GFP_KERNEL, &mISDN_proto); 768 if (!sk) 769 return -ENOMEM; 770 771 sock_init_data(sock, sk); 772 sock->ops = &base_sock_ops; 773 sock->state = SS_UNCONNECTED; 774 sock_reset_flag(sk, SOCK_ZAPPED); 775 sk->sk_protocol = protocol; 776 sk->sk_state = MISDN_OPEN; 777 mISDN_sock_link(&base_sockets, sk); 778 779 return 0; 780 } 781 782 static int 783 mISDN_sock_create(struct net *net, struct socket *sock, int proto, int kern) 784 { 785 int err = -EPROTONOSUPPORT; 786 787 switch (proto) { 788 case ISDN_P_BASE: 789 err = base_sock_create(net, sock, proto); 790 break; 791 case ISDN_P_TE_S0: 792 case ISDN_P_NT_S0: 793 case ISDN_P_TE_E1: 794 case ISDN_P_NT_E1: 795 case ISDN_P_LAPD_TE: 796 case ISDN_P_LAPD_NT: 797 case ISDN_P_B_RAW: 798 case ISDN_P_B_HDLC: 799 case ISDN_P_B_X75SLP: 800 case ISDN_P_B_L2DTMF: 801 case ISDN_P_B_L2DSP: 802 case ISDN_P_B_L2DSPHDLC: 803 err = data_sock_create(net, sock, proto); 804 break; 805 default: 806 return err; 807 } 808 809 return err; 810 } 811 812 static const struct net_proto_family mISDN_sock_family_ops = { 813 .owner = THIS_MODULE, 814 .family = PF_ISDN, 815 .create = mISDN_sock_create, 816 }; 817 818 int 819 misdn_sock_init(u_int *deb) 820 { 821 int err; 822 823 debug = deb; 824 err = sock_register(&mISDN_sock_family_ops); 825 if (err) 826 printk(KERN_ERR "%s: error(%d)\n", __func__, err); 827 return err; 828 } 829 830 void 831 misdn_sock_cleanup(void) 832 { 833 sock_unregister(PF_ISDN); 834 } 835 836