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 memset(&di, 0, sizeof(di)); 396 di.id = dev->id; 397 di.Dprotocols = dev->Dprotocols; 398 di.Bprotocols = dev->Bprotocols | get_all_Bprotocols(); 399 di.protocol = dev->D.protocol; 400 memcpy(di.channelmap, dev->channelmap, 401 sizeof(di.channelmap)); 402 di.nrbchan = dev->nrbchan; 403 strcpy(di.name, dev_name(&dev->dev)); 404 if (copy_to_user((void __user *)arg, &di, sizeof(di))) 405 err = -EFAULT; 406 } else 407 err = -ENODEV; 408 break; 409 default: 410 if (sk->sk_state == MISDN_BOUND) 411 err = data_sock_ioctl_bound(sk, cmd, 412 (void __user *)arg); 413 else 414 err = -ENOTCONN; 415 } 416 return err; 417 } 418 419 static int data_sock_setsockopt(struct socket *sock, int level, int optname, 420 char __user *optval, unsigned int len) 421 { 422 struct sock *sk = sock->sk; 423 int err = 0, opt = 0; 424 425 if (*debug & DEBUG_SOCKET) 426 printk(KERN_DEBUG "%s(%p, %d, %x, %p, %d)\n", __func__, sock, 427 level, optname, optval, len); 428 429 lock_sock(sk); 430 431 switch (optname) { 432 case MISDN_TIME_STAMP: 433 if (get_user(opt, (int __user *)optval)) { 434 err = -EFAULT; 435 break; 436 } 437 438 if (opt) 439 _pms(sk)->cmask |= MISDN_TIME_STAMP; 440 else 441 _pms(sk)->cmask &= ~MISDN_TIME_STAMP; 442 break; 443 default: 444 err = -ENOPROTOOPT; 445 break; 446 } 447 release_sock(sk); 448 return err; 449 } 450 451 static int data_sock_getsockopt(struct socket *sock, int level, int optname, 452 char __user *optval, int __user *optlen) 453 { 454 struct sock *sk = sock->sk; 455 int len, opt; 456 457 if (get_user(len, optlen)) 458 return -EFAULT; 459 460 switch (optname) { 461 case MISDN_TIME_STAMP: 462 if (_pms(sk)->cmask & MISDN_TIME_STAMP) 463 opt = 1; 464 else 465 opt = 0; 466 467 if (put_user(opt, optval)) 468 return -EFAULT; 469 break; 470 default: 471 return -ENOPROTOOPT; 472 } 473 474 return 0; 475 } 476 477 static int 478 data_sock_bind(struct socket *sock, struct sockaddr *addr, int addr_len) 479 { 480 struct sockaddr_mISDN *maddr = (struct sockaddr_mISDN *) addr; 481 struct sock *sk = sock->sk; 482 struct hlist_node *node; 483 struct sock *csk; 484 int err = 0; 485 486 if (*debug & DEBUG_SOCKET) 487 printk(KERN_DEBUG "%s(%p) sk=%p\n", __func__, sock, sk); 488 if (addr_len != sizeof(struct sockaddr_mISDN)) 489 return -EINVAL; 490 if (!maddr || maddr->family != AF_ISDN) 491 return -EINVAL; 492 493 lock_sock(sk); 494 495 if (_pms(sk)->dev) { 496 err = -EALREADY; 497 goto done; 498 } 499 _pms(sk)->dev = get_mdevice(maddr->dev); 500 if (!_pms(sk)->dev) { 501 err = -ENODEV; 502 goto done; 503 } 504 505 if (sk->sk_protocol < ISDN_P_B_START) { 506 read_lock_bh(&data_sockets.lock); 507 sk_for_each(csk, node, &data_sockets.head) { 508 if (sk == csk) 509 continue; 510 if (_pms(csk)->dev != _pms(sk)->dev) 511 continue; 512 if (csk->sk_protocol >= ISDN_P_B_START) 513 continue; 514 if (IS_ISDN_P_TE(csk->sk_protocol) 515 == IS_ISDN_P_TE(sk->sk_protocol)) 516 continue; 517 read_unlock_bh(&data_sockets.lock); 518 err = -EBUSY; 519 goto done; 520 } 521 read_unlock_bh(&data_sockets.lock); 522 } 523 524 _pms(sk)->ch.send = mISDN_send; 525 _pms(sk)->ch.ctrl = mISDN_ctrl; 526 527 switch (sk->sk_protocol) { 528 case ISDN_P_TE_S0: 529 case ISDN_P_NT_S0: 530 case ISDN_P_TE_E1: 531 case ISDN_P_NT_E1: 532 mISDN_sock_unlink(&data_sockets, sk); 533 err = connect_layer1(_pms(sk)->dev, &_pms(sk)->ch, 534 sk->sk_protocol, maddr); 535 if (err) 536 mISDN_sock_link(&data_sockets, sk); 537 break; 538 case ISDN_P_LAPD_TE: 539 case ISDN_P_LAPD_NT: 540 err = create_l2entity(_pms(sk)->dev, &_pms(sk)->ch, 541 sk->sk_protocol, maddr); 542 break; 543 case ISDN_P_B_RAW: 544 case ISDN_P_B_HDLC: 545 case ISDN_P_B_X75SLP: 546 case ISDN_P_B_L2DTMF: 547 case ISDN_P_B_L2DSP: 548 case ISDN_P_B_L2DSPHDLC: 549 err = connect_Bstack(_pms(sk)->dev, &_pms(sk)->ch, 550 sk->sk_protocol, maddr); 551 break; 552 default: 553 err = -EPROTONOSUPPORT; 554 } 555 if (err) 556 goto done; 557 sk->sk_state = MISDN_BOUND; 558 _pms(sk)->ch.protocol = sk->sk_protocol; 559 560 done: 561 release_sock(sk); 562 return err; 563 } 564 565 static int 566 data_sock_getname(struct socket *sock, struct sockaddr *addr, 567 int *addr_len, int peer) 568 { 569 struct sockaddr_mISDN *maddr = (struct sockaddr_mISDN *) addr; 570 struct sock *sk = sock->sk; 571 572 if (!_pms(sk)->dev) 573 return -EBADFD; 574 575 lock_sock(sk); 576 577 *addr_len = sizeof(*maddr); 578 maddr->dev = _pms(sk)->dev->id; 579 maddr->channel = _pms(sk)->ch.nr; 580 maddr->sapi = _pms(sk)->ch.addr & 0xff; 581 maddr->tei = (_pms(sk)->ch.addr >> 8) & 0xff; 582 release_sock(sk); 583 return 0; 584 } 585 586 static const struct proto_ops data_sock_ops = { 587 .family = PF_ISDN, 588 .owner = THIS_MODULE, 589 .release = data_sock_release, 590 .ioctl = data_sock_ioctl, 591 .bind = data_sock_bind, 592 .getname = data_sock_getname, 593 .sendmsg = mISDN_sock_sendmsg, 594 .recvmsg = mISDN_sock_recvmsg, 595 .poll = datagram_poll, 596 .listen = sock_no_listen, 597 .shutdown = sock_no_shutdown, 598 .setsockopt = data_sock_setsockopt, 599 .getsockopt = data_sock_getsockopt, 600 .connect = sock_no_connect, 601 .socketpair = sock_no_socketpair, 602 .accept = sock_no_accept, 603 .mmap = sock_no_mmap 604 }; 605 606 static int 607 data_sock_create(struct net *net, struct socket *sock, int protocol) 608 { 609 struct sock *sk; 610 611 if (sock->type != SOCK_DGRAM) 612 return -ESOCKTNOSUPPORT; 613 614 sk = sk_alloc(net, PF_ISDN, GFP_KERNEL, &mISDN_proto); 615 if (!sk) 616 return -ENOMEM; 617 618 sock_init_data(sock, sk); 619 620 sock->ops = &data_sock_ops; 621 sock->state = SS_UNCONNECTED; 622 sock_reset_flag(sk, SOCK_ZAPPED); 623 624 sk->sk_protocol = protocol; 625 sk->sk_state = MISDN_OPEN; 626 mISDN_sock_link(&data_sockets, sk); 627 628 return 0; 629 } 630 631 static int 632 base_sock_release(struct socket *sock) 633 { 634 struct sock *sk = sock->sk; 635 636 printk(KERN_DEBUG "%s(%p) sk=%p\n", __func__, sock, sk); 637 if (!sk) 638 return 0; 639 640 mISDN_sock_unlink(&base_sockets, sk); 641 sock_orphan(sk); 642 sock_put(sk); 643 644 return 0; 645 } 646 647 static int 648 base_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) 649 { 650 int err = 0, id; 651 struct mISDNdevice *dev; 652 struct mISDNversion ver; 653 654 switch (cmd) { 655 case IMGETVERSION: 656 ver.major = MISDN_MAJOR_VERSION; 657 ver.minor = MISDN_MINOR_VERSION; 658 ver.release = MISDN_RELEASE; 659 if (copy_to_user((void __user *)arg, &ver, sizeof(ver))) 660 err = -EFAULT; 661 break; 662 case IMGETCOUNT: 663 id = get_mdevice_count(); 664 if (put_user(id, (int __user *)arg)) 665 err = -EFAULT; 666 break; 667 case IMGETDEVINFO: 668 if (get_user(id, (int __user *)arg)) { 669 err = -EFAULT; 670 break; 671 } 672 dev = get_mdevice(id); 673 if (dev) { 674 struct mISDN_devinfo di; 675 676 memset(&di, 0, sizeof(di)); 677 di.id = dev->id; 678 di.Dprotocols = dev->Dprotocols; 679 di.Bprotocols = dev->Bprotocols | get_all_Bprotocols(); 680 di.protocol = dev->D.protocol; 681 memcpy(di.channelmap, dev->channelmap, 682 sizeof(di.channelmap)); 683 di.nrbchan = dev->nrbchan; 684 strcpy(di.name, dev_name(&dev->dev)); 685 if (copy_to_user((void __user *)arg, &di, sizeof(di))) 686 err = -EFAULT; 687 } else 688 err = -ENODEV; 689 break; 690 case IMSETDEVNAME: 691 { 692 struct mISDN_devrename dn; 693 if (copy_from_user(&dn, (void __user *)arg, 694 sizeof(dn))) { 695 err = -EFAULT; 696 break; 697 } 698 dev = get_mdevice(dn.id); 699 if (dev) 700 err = device_rename(&dev->dev, dn.name); 701 else 702 err = -ENODEV; 703 } 704 break; 705 default: 706 err = -EINVAL; 707 } 708 return err; 709 } 710 711 static int 712 base_sock_bind(struct socket *sock, struct sockaddr *addr, int addr_len) 713 { 714 struct sockaddr_mISDN *maddr = (struct sockaddr_mISDN *) addr; 715 struct sock *sk = sock->sk; 716 int err = 0; 717 718 if (!maddr || maddr->family != AF_ISDN) 719 return -EINVAL; 720 721 lock_sock(sk); 722 723 if (_pms(sk)->dev) { 724 err = -EALREADY; 725 goto done; 726 } 727 728 _pms(sk)->dev = get_mdevice(maddr->dev); 729 if (!_pms(sk)->dev) { 730 err = -ENODEV; 731 goto done; 732 } 733 sk->sk_state = MISDN_BOUND; 734 735 done: 736 release_sock(sk); 737 return err; 738 } 739 740 static const struct proto_ops base_sock_ops = { 741 .family = PF_ISDN, 742 .owner = THIS_MODULE, 743 .release = base_sock_release, 744 .ioctl = base_sock_ioctl, 745 .bind = base_sock_bind, 746 .getname = sock_no_getname, 747 .sendmsg = sock_no_sendmsg, 748 .recvmsg = sock_no_recvmsg, 749 .poll = sock_no_poll, 750 .listen = sock_no_listen, 751 .shutdown = sock_no_shutdown, 752 .setsockopt = sock_no_setsockopt, 753 .getsockopt = sock_no_getsockopt, 754 .connect = sock_no_connect, 755 .socketpair = sock_no_socketpair, 756 .accept = sock_no_accept, 757 .mmap = sock_no_mmap 758 }; 759 760 761 static int 762 base_sock_create(struct net *net, struct socket *sock, int protocol) 763 { 764 struct sock *sk; 765 766 if (sock->type != SOCK_RAW) 767 return -ESOCKTNOSUPPORT; 768 769 sk = sk_alloc(net, PF_ISDN, GFP_KERNEL, &mISDN_proto); 770 if (!sk) 771 return -ENOMEM; 772 773 sock_init_data(sock, sk); 774 sock->ops = &base_sock_ops; 775 sock->state = SS_UNCONNECTED; 776 sock_reset_flag(sk, SOCK_ZAPPED); 777 sk->sk_protocol = protocol; 778 sk->sk_state = MISDN_OPEN; 779 mISDN_sock_link(&base_sockets, sk); 780 781 return 0; 782 } 783 784 static int 785 mISDN_sock_create(struct net *net, struct socket *sock, int proto, int kern) 786 { 787 int err = -EPROTONOSUPPORT; 788 789 switch (proto) { 790 case ISDN_P_BASE: 791 err = base_sock_create(net, sock, proto); 792 break; 793 case ISDN_P_TE_S0: 794 case ISDN_P_NT_S0: 795 case ISDN_P_TE_E1: 796 case ISDN_P_NT_E1: 797 case ISDN_P_LAPD_TE: 798 case ISDN_P_LAPD_NT: 799 case ISDN_P_B_RAW: 800 case ISDN_P_B_HDLC: 801 case ISDN_P_B_X75SLP: 802 case ISDN_P_B_L2DTMF: 803 case ISDN_P_B_L2DSP: 804 case ISDN_P_B_L2DSPHDLC: 805 err = data_sock_create(net, sock, proto); 806 break; 807 default: 808 return err; 809 } 810 811 return err; 812 } 813 814 static const struct net_proto_family mISDN_sock_family_ops = { 815 .owner = THIS_MODULE, 816 .family = PF_ISDN, 817 .create = mISDN_sock_create, 818 }; 819 820 int 821 misdn_sock_init(u_int *deb) 822 { 823 int err; 824 825 debug = deb; 826 err = sock_register(&mISDN_sock_family_ops); 827 if (err) 828 printk(KERN_ERR "%s: error(%d)\n", __func__, err); 829 return err; 830 } 831 832 void 833 misdn_sock_cleanup(void) 834 { 835 sock_unregister(PF_ISDN); 836 } 837 838