net/rose/af_rose.c

   1 /*
   2  * This program is free software; you can redistribute it and/or modify
   3  * it under the terms of the GNU General Public License as published by
   4  * the Free Software Foundation; either version 2 of the License, or
   5  * (at your option) any later version.
   6  *
   7  * Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
   8  * Copyright (C) Alan Cox GW4PTS (alan@lxorguk.ukuu.org.uk)
   9  * Copyright (C) Terry Dawson VK2KTJ (terry@animats.net)
  10  * Copyright (C) Tomi Manninen OH2BNS (oh2bns@sral.fi)
  11  */
  12
  13 #include <linux/capability.h>
  14 #include <linux/module.h>
  15 #include <linux/moduleparam.h>
  16 #include <linux/init.h>
  17 #include <linux/errno.h>
  18 #include <linux/types.h>
  19 #include <linux/socket.h>
  20 #include <linux/in.h>
  21 #include <linux/slab.h>
  22 #include <linux/kernel.h>
  23 #include <linux/sched.h>
  24 #include <linux/spinlock.h>
  25 #include <linux/timer.h>
  26 #include <linux/string.h>
  27 #include <linux/sockios.h>
  28 #include <linux/net.h>
  29 #include <linux/stat.h>
  30 #include <net/net_namespace.h>
  31 #include <net/ax25.h>
  32 #include <linux/inet.h>
  33 #include <linux/netdevice.h>
  34 #include <linux/if_arp.h>
  35 #include <linux/skbuff.h>
  36 #include <net/sock.h>
  37 #include <asm/system.h>
  38 #include <asm/uaccess.h>
  39 #include <linux/fcntl.h>
  40 #include <linux/termios.h>
  41 #include <linux/mm.h>
  42 #include <linux/interrupt.h>
  43 #include <linux/notifier.h>
  44 #include <net/rose.h>
  45 #include <linux/proc_fs.h>
  46 #include <linux/seq_file.h>
  47 #include <net/tcp_states.h>
  48 #include <net/ip.h>
  49 #include <net/arp.h>
  50
  51 static int rose_ndevs = 10;
  52
  53 int sysctl_rose_restart_request_timeout = ROSE_DEFAULT_T0;
  54 int sysctl_rose_call_request_timeout    = ROSE_DEFAULT_T1;
  55 int sysctl_rose_reset_request_timeout   = ROSE_DEFAULT_T2;
  56 int sysctl_rose_clear_request_timeout   = ROSE_DEFAULT_T3;
  57 int sysctl_rose_no_activity_timeout     = ROSE_DEFAULT_IDLE;
  58 int sysctl_rose_ack_hold_back_timeout   = ROSE_DEFAULT_HB;
  59 int sysctl_rose_routing_control         = ROSE_DEFAULT_ROUTING;
  60 int sysctl_rose_link_fail_timeout       = ROSE_DEFAULT_FAIL_TIMEOUT;
  61 int sysctl_rose_maximum_vcs             = ROSE_DEFAULT_MAXVC;
  62 int sysctl_rose_window_size             = ROSE_DEFAULT_WINDOW_SIZE;
  63
  64 static HLIST_HEAD(rose_list);
  65 static DEFINE_SPINLOCK(rose_list_lock);
  66
  67 static const struct proto_ops rose_proto_ops;
  68
  69 ax25_address rose_callsign;
  70
  71 /*
  72  * ROSE network devices are virtual network devices encapsulating ROSE
  73  * frames into AX.25 which will be sent through an AX.25 device, so form a
  74  * special "super class" of normal net devices; split their locks off into a
  75  * separate class since they always nest.
  76  */
  77 static struct lock_class_key rose_netdev_xmit_lock_key;
  78 static struct lock_class_key rose_netdev_addr_lock_key;
  79
  80 static void rose_set_lockdep_one(struct net_device *dev,
  81                                  struct netdev_queue *txq,
  82                                  void *_unused)
  83 {
  84         lockdep_set_class(&txq->_xmit_lock, &rose_netdev_xmit_lock_key);
  85 }
  86
  87 static void rose_set_lockdep_key(struct net_device *dev)
  88 {
  89         lockdep_set_class(&dev->addr_list_lock, &rose_netdev_addr_lock_key);
  90         netdev_for_each_tx_queue(dev, rose_set_lockdep_one, NULL);
  91 }
  92
  93 /*
  94  *      Convert a ROSE address into text.
  95  */
  96 char *rose2asc(char *buf, const rose_address *addr)
  97 {
  98         if (addr->rose_addr[0] == 0x00 && addr->rose_addr[1] == 0x00 &&
  99             addr->rose_addr[2] == 0x00 && addr->rose_addr[3] == 0x00 &&
 100             addr->rose_addr[4] == 0x00) {
 101                 strcpy(buf, "*");
 102         } else {
 103                 sprintf(buf, "%02X%02X%02X%02X%02X", addr->rose_addr[0] & 0xFF,
 104                                                 addr->rose_addr[1] & 0xFF,
 105                                                 addr->rose_addr[2] & 0xFF,
 106                                                 addr->rose_addr[3] & 0xFF,
 107                                                 addr->rose_addr[4] & 0xFF);
 108         }
 109
 110         return buf;
 111 }
 112
 113 /*
 114  *      Compare two ROSE addresses, 0 == equal.
 115  */
 116 int rosecmp(rose_address *addr1, rose_address *addr2)
 117 {
 118         int i;
 119
 120         for (i = 0; i < 5; i++)
 121                 if (addr1->rose_addr[i] != addr2->rose_addr[i])
 122                         return 1;
 123
 124         return 0;
 125 }
 126
 127 /*
 128  *      Compare two ROSE addresses for only mask digits, 0 == equal.
 129  */
 130 int rosecmpm(rose_address *addr1, rose_address *addr2, unsigned short mask)
 131 {
 132         unsigned int i, j;
 133
 134         if (mask > 10)
 135                 return 1;
 136
 137         for (i = 0; i < mask; i++) {
 138                 j = i / 2;
 139
 140                 if ((i % 2) != 0) {
 141                         if ((addr1->rose_addr[j] & 0x0F) != (addr2->rose_addr[j] & 0x0F))
 142                                 return 1;
 143                 } else {
 144                         if ((addr1->rose_addr[j] & 0xF0) != (addr2->rose_addr[j] & 0xF0))
 145                                 return 1;
 146                 }
 147         }
 148
 149         return 0;
 150 }
 151
 152 /*
 153  *      Socket removal during an interrupt is now safe.
 154  */
 155 static void rose_remove_socket(struct sock *sk)
 156 {
 157         spin_lock_bh(&rose_list_lock);
 158         sk_del_node_init(sk);
 159         spin_unlock_bh(&rose_list_lock);
 160 }
 161
 162 /*
 163  *      Kill all bound sockets on a broken link layer connection to a
 164  *      particular neighbour.
 165  */
 166 void rose_kill_by_neigh(struct rose_neigh *neigh)
 167 {
 168         struct sock *s;
 169         struct hlist_node *node;
 170
 171         spin_lock_bh(&rose_list_lock);
 172         sk_for_each(s, node, &rose_list) {
 173                 struct rose_sock *rose = rose_sk(s);
 174
 175                 if (rose->neighbour == neigh) {
 176                         rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0);
 177                         rose->neighbour->use--;
 178                         rose->neighbour = NULL;
 179                 }
 180         }
 181         spin_unlock_bh(&rose_list_lock);
 182 }
 183
 184 /*
 185  *      Kill all bound sockets on a dropped device.
 186  */
 187 static void rose_kill_by_device(struct net_device *dev)
 188 {
 189         struct sock *s;
 190         struct hlist_node *node;
 191
 192         spin_lock_bh(&rose_list_lock);
 193         sk_for_each(s, node, &rose_list) {
 194                 struct rose_sock *rose = rose_sk(s);
 195
 196                 if (rose->device == dev) {
 197                         rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0);
 198                         rose->neighbour->use--;
 199                         rose->device = NULL;
 200                 }
 201         }
 202         spin_unlock_bh(&rose_list_lock);
 203 }
 204
 205 /*
 206  *      Handle device status changes.
 207  */
 208 static int rose_device_event(struct notifier_block *this, unsigned long event,
 209         void *ptr)
 210 {
 211         struct net_device *dev = (struct net_device *)ptr;
 212
 213         if (!net_eq(dev_net(dev), &init_net))
 214                 return NOTIFY_DONE;
 215
 216         if (event != NETDEV_DOWN)
 217                 return NOTIFY_DONE;
 218
 219         switch (dev->type) {
 220         case ARPHRD_ROSE:
 221                 rose_kill_by_device(dev);
 222                 break;
 223         case ARPHRD_AX25:
 224                 rose_link_device_down(dev);
 225                 rose_rt_device_down(dev);
 226                 break;
 227         }
 228
 229         return NOTIFY_DONE;
 230 }
 231
 232 /*
 233  *      Add a socket to the bound sockets list.
 234  */
 235 static void rose_insert_socket(struct sock *sk)
 236 {
 237
 238         spin_lock_bh(&rose_list_lock);
 239         sk_add_node(sk, &rose_list);
 240         spin_unlock_bh(&rose_list_lock);
 241 }
 242
 243 /*
 244  *      Find a socket that wants to accept the Call Request we just
 245  *      received.
 246  */
 247 static struct sock *rose_find_listener(rose_address *addr, ax25_address *call)
 248 {
 249         struct sock *s;
 250         struct hlist_node *node;
 251
 252         spin_lock_bh(&rose_list_lock);
 253         sk_for_each(s, node, &rose_list) {
 254                 struct rose_sock *rose = rose_sk(s);
 255
 256                 if (!rosecmp(&rose->source_addr, addr) &&
 257                     !ax25cmp(&rose->source_call, call) &&
 258                     !rose->source_ndigis && s->sk_state == TCP_LISTEN)
 259                         goto found;
 260         }
 261
 262         sk_for_each(s, node, &rose_list) {
 263                 struct rose_sock *rose = rose_sk(s);
 264
 265                 if (!rosecmp(&rose->source_addr, addr) &&
 266                     !ax25cmp(&rose->source_call, &null_ax25_address) &&
 267                     s->sk_state == TCP_LISTEN)
 268                         goto found;
 269         }
 270         s = NULL;
 271 found:
 272         spin_unlock_bh(&rose_list_lock);
 273         return s;
 274 }
 275
 276 /*
 277  *      Find a connected ROSE socket given my LCI and device.
 278  */
 279 struct sock *rose_find_socket(unsigned int lci, struct rose_neigh *neigh)
 280 {
 281         struct sock *s;
 282         struct hlist_node *node;
 283
 284         spin_lock_bh(&rose_list_lock);
 285         sk_for_each(s, node, &rose_list) {
 286                 struct rose_sock *rose = rose_sk(s);
 287
 288                 if (rose->lci == lci && rose->neighbour == neigh)
 289                         goto found;
 290         }
 291         s = NULL;
 292 found:
 293         spin_unlock_bh(&rose_list_lock);
 294         return s;
 295 }
 296
 297 /*
 298  *      Find a unique LCI for a given device.
 299  */
 300 unsigned int rose_new_lci(struct rose_neigh *neigh)
 301 {
 302         int lci;
 303
 304         if (neigh->dce_mode) {
 305                 for (lci = 1; lci <= sysctl_rose_maximum_vcs; lci++)
 306                         if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL)
 307                                 return lci;
 308         } else {
 309                 for (lci = sysctl_rose_maximum_vcs; lci > 0; lci--)
 310                         if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL)
 311                                 return lci;
 312         }
 313
 314         return 0;
 315 }
 316
 317 /*
 318  *      Deferred destroy.
 319  */
 320 void rose_destroy_socket(struct sock *);
 321
 322 /*
 323  *      Handler for deferred kills.
 324  */
 325 static void rose_destroy_timer(unsigned long data)
 326 {
 327         rose_destroy_socket((struct sock *)data);
 328 }
 329
 330 /*
 331  *      This is called from user mode and the timers. Thus it protects itself
 332  *      against interrupt users but doesn't worry about being called during
 333  *      work.  Once it is removed from the queue no interrupt or bottom half
 334  *      will touch it and we are (fairly 8-) ) safe.
 335  */
 336 void rose_destroy_socket(struct sock *sk)
 337 {
 338         struct sk_buff *skb;
 339
 340         rose_remove_socket(sk);
 341         rose_stop_heartbeat(sk);
 342         rose_stop_idletimer(sk);
 343         rose_stop_timer(sk);
 344
 345         rose_clear_queues(sk);          /* Flush the queues */
 346
 347         while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) {
 348                 if (skb->sk != sk) {    /* A pending connection */
 349                         /* Queue the unaccepted socket for death */
 350                         sock_set_flag(skb->sk, SOCK_DEAD);
 351                         rose_start_heartbeat(skb->sk);
 352                         rose_sk(skb->sk)->state = ROSE_STATE_0;
 353                 }
 354
 355                 kfree_skb(skb);
 356         }
 357
 358         if (sk_has_allocations(sk)) {
 359                 /* Defer: outstanding buffers */
 360                 setup_timer(&sk->sk_timer, rose_destroy_timer,
 361                                 (unsigned long)sk);
 362                 sk->sk_timer.expires  = jiffies + 10 * HZ;
 363                 add_timer(&sk->sk_timer);
 364         } else
 365                 sock_put(sk);
 366 }
 367
 368 /*
 369  *      Handling for system calls applied via the various interfaces to a
 370  *      ROSE socket object.
 371  */
 372
 373 static int rose_setsockopt(struct socket *sock, int level, int optname,
 374         char __user *optval, unsigned int optlen)
 375 {
 376         struct sock *sk = sock->sk;
 377         struct rose_sock *rose = rose_sk(sk);
 378         int opt;
 379
 380         if (level != SOL_ROSE)
 381                 return -ENOPROTOOPT;
 382
 383         if (optlen < sizeof(int))
 384                 return -EINVAL;
 385
 386         if (get_user(opt, (int __user *)optval))
 387                 return -EFAULT;
 388
 389         switch (optname) {
 390         case ROSE_DEFER:
 391                 rose->defer = opt ? 1 : 0;
 392                 return 0;
 393
 394         case ROSE_T1:
 395                 if (opt < 1)
 396                         return -EINVAL;
 397                 rose->t1 = opt * HZ;
 398                 return 0;
 399
 400         case ROSE_T2:
 401                 if (opt < 1)
 402                         return -EINVAL;
 403                 rose->t2 = opt * HZ;
 404                 return 0;
 405
 406         case ROSE_T3:
 407                 if (opt < 1)
 408                         return -EINVAL;
 409                 rose->t3 = opt * HZ;
 410                 return 0;
 411
 412         case ROSE_HOLDBACK:
 413                 if (opt < 1)
 414                         return -EINVAL;
 415                 rose->hb = opt * HZ;
 416                 return 0;
 417
 418         case ROSE_IDLE:
 419                 if (opt < 0)
 420                         return -EINVAL;
 421                 rose->idle = opt * 60 * HZ;
 422                 return 0;
 423
 424         case ROSE_QBITINCL:
 425                 rose->qbitincl = opt ? 1 : 0;
 426                 return 0;
 427
 428         default:
 429                 return -ENOPROTOOPT;
 430         }
 431 }
 432
 433 static int rose_getsockopt(struct socket *sock, int level, int optname,
 434         char __user *optval, int __user *optlen)
 435 {
 436         struct sock *sk = sock->sk;
 437         struct rose_sock *rose = rose_sk(sk);
 438         int val = 0;
 439         int len;
 440
 441         if (level != SOL_ROSE)
 442                 return -ENOPROTOOPT;
 443
 444         if (get_user(len, optlen))
 445                 return -EFAULT;
 446
 447         if (len < 0)
 448                 return -EINVAL;
 449
 450         switch (optname) {
 451         case ROSE_DEFER:
 452                 val = rose->defer;
 453                 break;
 454
 455         case ROSE_T1:
 456                 val = rose->t1 / HZ;
 457                 break;
 458
 459         case ROSE_T2:
 460                 val = rose->t2 / HZ;
 461                 break;
 462
 463         case ROSE_T3:
 464                 val = rose->t3 / HZ;
 465                 break;
 466
 467         case ROSE_HOLDBACK:
 468                 val = rose->hb / HZ;
 469                 break;
 470
 471         case ROSE_IDLE:
 472                 val = rose->idle / (60 * HZ);
 473                 break;
 474
 475         case ROSE_QBITINCL:
 476                 val = rose->qbitincl;
 477                 break;
 478
 479         default:
 480                 return -ENOPROTOOPT;
 481         }
 482
 483         len = min_t(unsigned int, len, sizeof(int));
 484
 485         if (put_user(len, optlen))
 486                 return -EFAULT;
 487
 488         return copy_to_user(optval, &val, len) ? -EFAULT : 0;
 489 }
 490
 491 static int rose_listen(struct socket *sock, int backlog)
 492 {
 493         struct sock *sk = sock->sk;
 494
 495         if (sk->sk_state != TCP_LISTEN) {
 496                 struct rose_sock *rose = rose_sk(sk);
 497
 498                 rose->dest_ndigis = 0;
 499                 memset(&rose->dest_addr, 0, ROSE_ADDR_LEN);
 500                 memset(&rose->dest_call, 0, AX25_ADDR_LEN);
 501                 memset(rose->dest_digis, 0, AX25_ADDR_LEN * ROSE_MAX_DIGIS);
 502                 sk->sk_max_ack_backlog = backlog;
 503                 sk->sk_state           = TCP_LISTEN;
 504                 return 0;
 505         }
 506
 507         return -EOPNOTSUPP;
 508 }
 509
 510 static struct proto rose_proto = {
 511         .name     = "ROSE",
 512         .owner    = THIS_MODULE,
 513         .obj_size = sizeof(struct rose_sock),
 514 };
 515
 516 static int rose_create(struct net *net, struct socket *sock, int protocol,
 517                        int kern)
 518 {
 519         struct sock *sk;
 520         struct rose_sock *rose;
 521
 522         if (!net_eq(net, &init_net))
 523                 return -EAFNOSUPPORT;
 524
 525         if (sock->type != SOCK_SEQPACKET || protocol != 0)
 526                 return -ESOCKTNOSUPPORT;
 527
 528         sk = sk_alloc(net, PF_ROSE, GFP_ATOMIC, &rose_proto);
 529         if (sk == NULL)
 530                 return -ENOMEM;
 531
 532         rose = rose_sk(sk);
 533
 534         sock_init_data(sock, sk);
 535
 536         skb_queue_head_init(&rose->ack_queue);
 537 #ifdef M_BIT
 538         skb_queue_head_init(&rose->frag_queue);
 539         rose->fraglen    = 0;
 540 #endif
 541
 542         sock->ops    = &rose_proto_ops;
 543         sk->sk_protocol = protocol;
 544
 545         init_timer(&rose->timer);
 546         init_timer(&rose->idletimer);
 547
 548         rose->t1   = msecs_to_jiffies(sysctl_rose_call_request_timeout);
 549         rose->t2   = msecs_to_jiffies(sysctl_rose_reset_request_timeout);
 550         rose->t3   = msecs_to_jiffies(sysctl_rose_clear_request_timeout);
 551         rose->hb   = msecs_to_jiffies(sysctl_rose_ack_hold_back_timeout);
 552         rose->idle = msecs_to_jiffies(sysctl_rose_no_activity_timeout);
 553
 554         rose->state = ROSE_STATE_0;
 555
 556         return 0;
 557 }
 558
 559 static struct sock *rose_make_new(struct sock *osk)
 560 {
 561         struct sock *sk;
 562         struct rose_sock *rose, *orose;
 563
 564         if (osk->sk_type != SOCK_SEQPACKET)
 565                 return NULL;
 566
 567         sk = sk_alloc(sock_net(osk), PF_ROSE, GFP_ATOMIC, &rose_proto);
 568         if (sk == NULL)
 569                 return NULL;
 570
 571         rose = rose_sk(sk);
 572
 573         sock_init_data(NULL, sk);
 574
 575         skb_queue_head_init(&rose->ack_queue);
 576 #ifdef M_BIT
 577         skb_queue_head_init(&rose->frag_queue);
 578         rose->fraglen  = 0;
 579 #endif
 580
 581         sk->sk_type     = osk->sk_type;
 582         sk->sk_priority = osk->sk_priority;
 583         sk->sk_protocol = osk->sk_protocol;
 584         sk->sk_rcvbuf   = osk->sk_rcvbuf;
 585         sk->sk_sndbuf   = osk->sk_sndbuf;
 586         sk->sk_state    = TCP_ESTABLISHED;
 587         sock_copy_flags(sk, osk);
 588
 589         init_timer(&rose->timer);
 590         init_timer(&rose->idletimer);
 591
 592         orose           = rose_sk(osk);
 593         rose->t1        = orose->t1;
 594         rose->t2        = orose->t2;
 595         rose->t3        = orose->t3;
 596         rose->hb        = orose->hb;
 597         rose->idle      = orose->idle;
 598         rose->defer     = orose->defer;
 599         rose->device    = orose->device;
 600         rose->qbitincl  = orose->qbitincl;
 601
 602         return sk;
 603 }
 604
 605 static int rose_release(struct socket *sock)
 606 {
 607         struct sock *sk = sock->sk;
 608         struct rose_sock *rose;
 609
 610         if (sk == NULL) return 0;
 611
 612         sock_hold(sk);
 613         sock_orphan(sk);
 614         lock_sock(sk);
 615         rose = rose_sk(sk);
 616
 617         switch (rose->state) {
 618         case ROSE_STATE_0:
 619                 release_sock(sk);
 620                 rose_disconnect(sk, 0, -1, -1);
 621                 lock_sock(sk);
 622                 rose_destroy_socket(sk);
 623                 break;
 624
 625         case ROSE_STATE_2:
 626                 rose->neighbour->use--;
 627                 release_sock(sk);
 628                 rose_disconnect(sk, 0, -1, -1);
 629                 lock_sock(sk);
 630                 rose_destroy_socket(sk);
 631                 break;
 632
 633         case ROSE_STATE_1:
 634         case ROSE_STATE_3:
 635         case ROSE_STATE_4:
 636         case ROSE_STATE_5:
 637                 rose_clear_queues(sk);
 638                 rose_stop_idletimer(sk);
 639                 rose_write_internal(sk, ROSE_CLEAR_REQUEST);
 640                 rose_start_t3timer(sk);
 641                 rose->state  = ROSE_STATE_2;
 642                 sk->sk_state    = TCP_CLOSE;
 643                 sk->sk_shutdown |= SEND_SHUTDOWN;
 644                 sk->sk_state_change(sk);
 645                 sock_set_flag(sk, SOCK_DEAD);
 646                 sock_set_flag(sk, SOCK_DESTROY);
 647                 break;
 648
 649         default:
 650                 break;
 651         }
 652
 653         sock->sk = NULL;
 654         release_sock(sk);
 655         sock_put(sk);
 656
 657         return 0;
 658 }
 659
 660 static int rose_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
 661 {
 662         struct sock *sk = sock->sk;
 663         struct rose_sock *rose = rose_sk(sk);
 664         struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr;
 665         struct net_device *dev;
 666         ax25_address *source;
 667         ax25_uid_assoc *user;
 668         int n;
 669
 670         if (!sock_flag(sk, SOCK_ZAPPED))
 671                 return -EINVAL;
 672
 673         if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose))
 674                 return -EINVAL;
 675
 676         if (addr->srose_family != AF_ROSE)
 677                 return -EINVAL;
 678
 679         if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1)
 680                 return -EINVAL;
 681
 682         if ((unsigned int) addr->srose_ndigis > ROSE_MAX_DIGIS)
 683                 return -EINVAL;
 684
 685         if ((dev = rose_dev_get(&addr->srose_addr)) == NULL)
 686                 return -EADDRNOTAVAIL;
 687
 688         source = &addr->srose_call;
 689
 690         user = ax25_findbyuid(current_euid());
 691         if (user) {
 692                 rose->source_call = user->call;
 693                 ax25_uid_put(user);
 694         } else {
 695                 if (ax25_uid_policy && !capable(CAP_NET_BIND_SERVICE))
 696                         return -EACCES;
 697                 rose->source_call   = *source;
 698         }
 699
 700         rose->source_addr   = addr->srose_addr;
 701         rose->device        = dev;
 702         rose->source_ndigis = addr->srose_ndigis;
 703
 704         if (addr_len == sizeof(struct full_sockaddr_rose)) {
 705                 struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr;
 706                 for (n = 0 ; n < addr->srose_ndigis ; n++)
 707                         rose->source_digis[n] = full_addr->srose_digis[n];
 708         } else {
 709                 if (rose->source_ndigis == 1) {
 710                         rose->source_digis[0] = addr->srose_digi;
 711                 }
 712         }
 713
 714         rose_insert_socket(sk);
 715
 716         sock_reset_flag(sk, SOCK_ZAPPED);
 717
 718         return 0;
 719 }
 720
 721 static int rose_connect(struct socket *sock, struct sockaddr *uaddr, int addr_len, int flags)
 722 {
 723         struct sock *sk = sock->sk;
 724         struct rose_sock *rose = rose_sk(sk);
 725         struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr;
 726         unsigned char cause, diagnostic;
 727         struct net_device *dev;
 728         ax25_uid_assoc *user;
 729         int n, err = 0;
 730
 731         if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose))
 732                 return -EINVAL;
 733
 734         if (addr->srose_family != AF_ROSE)
 735                 return -EINVAL;
 736
 737         if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1)
 738                 return -EINVAL;
 739
 740         if ((unsigned int) addr->srose_ndigis > ROSE_MAX_DIGIS)
 741                 return -EINVAL;
 742
 743         /* Source + Destination digis should not exceed ROSE_MAX_DIGIS */
 744         if ((rose->source_ndigis + addr->srose_ndigis) > ROSE_MAX_DIGIS)
 745                 return -EINVAL;
 746
 747         lock_sock(sk);
 748
 749         if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) {
 750                 /* Connect completed during a ERESTARTSYS event */
 751                 sock->state = SS_CONNECTED;
 752                 goto out_release;
 753         }
 754
 755         if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) {
 756                 sock->state = SS_UNCONNECTED;
 757                 err = -ECONNREFUSED;
 758                 goto out_release;
 759         }
 760
 761         if (sk->sk_state == TCP_ESTABLISHED) {
 762                 /* No reconnect on a seqpacket socket */
 763                 err = -EISCONN;
 764                 goto out_release;
 765         }
 766
 767         sk->sk_state   = TCP_CLOSE;
 768         sock->state = SS_UNCONNECTED;
 769
 770         rose->neighbour = rose_get_neigh(&addr->srose_addr, &cause,
 771                                          &diagnostic, 0);
 772         if (!rose->neighbour) {
 773                 err = -ENETUNREACH;
 774                 goto out_release;
 775         }
 776
 777         rose->lci = rose_new_lci(rose->neighbour);
 778         if (!rose->lci) {
 779                 err = -ENETUNREACH;
 780                 goto out_release;
 781         }
 782
 783         if (sock_flag(sk, SOCK_ZAPPED)) {       /* Must bind first - autobinding in this may or may not work */
 784                 sock_reset_flag(sk, SOCK_ZAPPED);
 785
 786                 if ((dev = rose_dev_first()) == NULL) {
 787                         err = -ENETUNREACH;
 788                         goto out_release;
 789                 }
 790
 791                 user = ax25_findbyuid(current_euid());
 792                 if (!user) {
 793                         err = -EINVAL;
 794                         goto out_release;
 795                 }
 796
 797                 memcpy(&rose->source_addr, dev->dev_addr, ROSE_ADDR_LEN);
 798                 rose->source_call = user->call;
 799                 rose->device      = dev;
 800                 ax25_uid_put(user);
 801
 802                 rose_insert_socket(sk);         /* Finish the bind */
 803         }
 804         rose->dest_addr   = addr->srose_addr;
 805         rose->dest_call   = addr->srose_call;
 806         rose->rand        = ((long)rose & 0xFFFF) + rose->lci;
 807         rose->dest_ndigis = addr->srose_ndigis;
 808
 809         if (addr_len == sizeof(struct full_sockaddr_rose)) {
 810                 struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr;
 811                 for (n = 0 ; n < addr->srose_ndigis ; n++)
 812                         rose->dest_digis[n] = full_addr->srose_digis[n];
 813         } else {
 814                 if (rose->dest_ndigis == 1) {
 815                         rose->dest_digis[0] = addr->srose_digi;
 816                 }
 817         }
 818
 819         /* Move to connecting socket, start sending Connect Requests */
 820         sock->state   = SS_CONNECTING;
 821         sk->sk_state     = TCP_SYN_SENT;
 822
 823         rose->state = ROSE_STATE_1;
 824
 825         rose->neighbour->use++;
 826
 827         rose_write_internal(sk, ROSE_CALL_REQUEST);
 828         rose_start_heartbeat(sk);
 829         rose_start_t1timer(sk);
 830
 831         /* Now the loop */
 832         if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK)) {
 833                 err = -EINPROGRESS;
 834                 goto out_release;
 835         }
 836
 837         /*
 838          * A Connect Ack with Choke or timeout or failed routing will go to
 839          * closed.
 840          */
 841         if (sk->sk_state == TCP_SYN_SENT) {
 842                 DEFINE_WAIT(wait);
 843
 844                 for (;;) {
 845                         prepare_to_wait(sk_sleep(sk), &wait,
 846                                         TASK_INTERRUPTIBLE);
 847                         if (sk->sk_state != TCP_SYN_SENT)
 848                                 break;
 849                         if (!signal_pending(current)) {
 850                                 release_sock(sk);
 851                                 schedule();
 852                                 lock_sock(sk);
 853                                 continue;
 854                         }
 855                         err = -ERESTARTSYS;
 856                         break;
 857                 }
 858                 finish_wait(sk_sleep(sk), &wait);
 859
 860                 if (err)
 861                         goto out_release;
 862         }
 863
 864         if (sk->sk_state != TCP_ESTABLISHED) {
 865                 sock->state = SS_UNCONNECTED;
 866                 err = sock_error(sk);   /* Always set at this point */
 867                 goto out_release;
 868         }
 869
 870         sock->state = SS_CONNECTED;
 871
 872 out_release:
 873         release_sock(sk);
 874
 875         return err;
 876 }
 877
 878 static int rose_accept(struct socket *sock, struct socket *newsock, int flags)
 879 {
 880         struct sk_buff *skb;
 881         struct sock *newsk;
 882         DEFINE_WAIT(wait);
 883         struct sock *sk;
 884         int err = 0;
 885
 886         if ((sk = sock->sk) == NULL)
 887                 return -EINVAL;
 888
 889         lock_sock(sk);
 890         if (sk->sk_type != SOCK_SEQPACKET) {
 891                 err = -EOPNOTSUPP;
 892                 goto out_release;
 893         }
 894
 895         if (sk->sk_state != TCP_LISTEN) {
 896                 err = -EINVAL;
 897                 goto out_release;
 898         }
 899
 900         /*
 901          *      The write queue this time is holding sockets ready to use
 902          *      hooked into the SABM we saved
 903          */
 904         for (;;) {
 905                 prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
 906
 907                 skb = skb_dequeue(&sk->sk_receive_queue);
 908                 if (skb)
 909                         break;
 910
 911                 if (flags & O_NONBLOCK) {
 912                         err = -EWOULDBLOCK;
 913                         break;
 914                 }
 915                 if (!signal_pending(current)) {
 916                         release_sock(sk);
 917                         schedule();
 918                         lock_sock(sk);
 919                         continue;
 920                 }
 921                 err = -ERESTARTSYS;
 922                 break;
 923         }
 924         finish_wait(sk_sleep(sk), &wait);
 925         if (err)
 926                 goto out_release;
 927
 928         newsk = skb->sk;
 929         sock_graft(newsk, newsock);
 930
 931         /* Now attach up the new socket */
 932         skb->sk = NULL;
 933         kfree_skb(skb);
 934         sk->sk_ack_backlog--;
 935
 936 out_release:
 937         release_sock(sk);
 938
 939         return err;
 940 }
 941
 942 static int rose_getname(struct socket *sock, struct sockaddr *uaddr,
 943         int *uaddr_len, int peer)
 944 {
 945         struct full_sockaddr_rose *srose = (struct full_sockaddr_rose *)uaddr;
 946         struct sock *sk = sock->sk;
 947         struct rose_sock *rose = rose_sk(sk);
 948         int n;
 949
 950         memset(srose, 0, sizeof(*srose));
 951         if (peer != 0) {
 952                 if (sk->sk_state != TCP_ESTABLISHED)
 953                         return -ENOTCONN;
 954                 srose->srose_family = AF_ROSE;
 955                 srose->srose_addr   = rose->dest_addr;
 956                 srose->srose_call   = rose->dest_call;
 957                 srose->srose_ndigis = rose->dest_ndigis;
 958                 for (n = 0; n < rose->dest_ndigis; n++)
 959                         srose->srose_digis[n] = rose->dest_digis[n];
 960         } else {
 961                 srose->srose_family = AF_ROSE;
 962                 srose->srose_addr   = rose->source_addr;
 963                 srose->srose_call   = rose->source_call;
 964                 srose->srose_ndigis = rose->source_ndigis;
 965                 for (n = 0; n < rose->source_ndigis; n++)
 966                         srose->srose_digis[n] = rose->source_digis[n];
 967         }
 968
 969         *uaddr_len = sizeof(struct full_sockaddr_rose);
 970         return 0;
 971 }
 972
 973 int rose_rx_call_request(struct sk_buff *skb, struct net_device *dev, struct rose_neigh *neigh, unsigned int lci)
 974 {
 975         struct sock *sk;
 976         struct sock *make;
 977         struct rose_sock *make_rose;
 978         struct rose_facilities_struct facilities;
 979         int n;
 980
 981         skb->sk = NULL;         /* Initially we don't know who it's for */
 982
 983         /*
 984          *      skb->data points to the rose frame start
 985          */
 986         memset(&facilities, 0x00, sizeof(struct rose_facilities_struct));
 987
 988         if (!rose_parse_facilities(skb->data + ROSE_CALL_REQ_FACILITIES_OFF,
 989                                    skb->len - ROSE_CALL_REQ_FACILITIES_OFF,
 990                                    &facilities)) {
 991                 rose_transmit_clear_request(neigh, lci, ROSE_INVALID_FACILITY, 76);
 992                 return 0;
 993         }
 994
 995         sk = rose_find_listener(&facilities.source_addr, &facilities.source_call);
 996
 997         /*
 998          * We can't accept the Call Request.
 999          */
1000         if (sk == NULL || sk_acceptq_is_full(sk) ||
1001             (make = rose_make_new(sk)) == NULL) {
1002                 rose_transmit_clear_request(neigh, lci, ROSE_NETWORK_CONGESTION, 120);
1003                 return 0;
1004         }
1005
1006         skb->sk     = make;
1007         make->sk_state = TCP_ESTABLISHED;
1008         make_rose = rose_sk(make);
1009
1010         make_rose->lci           = lci;
1011         make_rose->dest_addr     = facilities.dest_addr;
1012         make_rose->dest_call     = facilities.dest_call;
1013         make_rose->dest_ndigis   = facilities.dest_ndigis;
1014         for (n = 0 ; n < facilities.dest_ndigis ; n++)
1015                 make_rose->dest_digis[n] = facilities.dest_digis[n];
1016         make_rose->source_addr   = facilities.source_addr;
1017         make_rose->source_call   = facilities.source_call;
1018         make_rose->source_ndigis = facilities.source_ndigis;
1019         for (n = 0 ; n < facilities.source_ndigis ; n++)
1020                 make_rose->source_digis[n]= facilities.source_digis[n];
1021         make_rose->neighbour     = neigh;
1022         make_rose->device        = dev;
1023         make_rose->facilities    = facilities;
1024
1025         make_rose->neighbour->use++;
1026
1027         if (rose_sk(sk)->defer) {
1028                 make_rose->state = ROSE_STATE_5;
1029         } else {
1030                 rose_write_internal(make, ROSE_CALL_ACCEPTED);
1031                 make_rose->state = ROSE_STATE_3;
1032                 rose_start_idletimer(make);
1033         }
1034
1035         make_rose->condition = 0x00;
1036         make_rose->vs        = 0;
1037         make_rose->va        = 0;
1038         make_rose->vr        = 0;
1039         make_rose->vl        = 0;
1040         sk->sk_ack_backlog++;
1041
1042         rose_insert_socket(make);
1043
1044         skb_queue_head(&sk->sk_receive_queue, skb);
1045
1046         rose_start_heartbeat(make);
1047
1048         if (!sock_flag(sk, SOCK_DEAD))
1049                 sk->sk_data_ready(sk, skb->len);
1050
1051         return 1;
1052 }
1053
1054 static int rose_sendmsg(struct kiocb *iocb, struct socket *sock,
1055                         struct msghdr *msg, size_t len)
1056 {
1057         struct sock *sk = sock->sk;
1058         struct rose_sock *rose = rose_sk(sk);
1059         struct sockaddr_rose *usrose = (struct sockaddr_rose *)msg->msg_name;
1060         int err;
1061         struct full_sockaddr_rose srose;
1062         struct sk_buff *skb;
1063         unsigned char *asmptr;
1064         int n, size, qbit = 0;
1065
1066         if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT))
1067                 return -EINVAL;
1068
1069         if (sock_flag(sk, SOCK_ZAPPED))
1070                 return -EADDRNOTAVAIL;
1071
1072         if (sk->sk_shutdown & SEND_SHUTDOWN) {
1073                 send_sig(SIGPIPE, current, 0);
1074                 return -EPIPE;
1075         }
1076
1077         if (rose->neighbour == NULL || rose->device == NULL)
1078                 return -ENETUNREACH;
1079
1080         if (usrose != NULL) {
1081                 if (msg->msg_namelen != sizeof(struct sockaddr_rose) && msg->msg_namelen != sizeof(struct full_sockaddr_rose))
1082                         return -EINVAL;
1083                 memset(&srose, 0, sizeof(struct full_sockaddr_rose));
1084                 memcpy(&srose, usrose, msg->msg_namelen);
1085                 if (rosecmp(&rose->dest_addr, &srose.srose_addr) != 0 ||
1086                     ax25cmp(&rose->dest_call, &srose.srose_call) != 0)
1087                         return -EISCONN;
1088                 if (srose.srose_ndigis != rose->dest_ndigis)
1089                         return -EISCONN;
1090                 if (srose.srose_ndigis == rose->dest_ndigis) {
1091                         for (n = 0 ; n < srose.srose_ndigis ; n++)
1092                                 if (ax25cmp(&rose->dest_digis[n],
1093                                             &srose.srose_digis[n]))
1094                                         return -EISCONN;
1095                 }
1096                 if (srose.srose_family != AF_ROSE)
1097                         return -EINVAL;
1098         } else {
1099                 if (sk->sk_state != TCP_ESTABLISHED)
1100                         return -ENOTCONN;
1101
1102                 srose.srose_family = AF_ROSE;
1103                 srose.srose_addr   = rose->dest_addr;
1104                 srose.srose_call   = rose->dest_call;
1105                 srose.srose_ndigis = rose->dest_ndigis;
1106                 for (n = 0 ; n < rose->dest_ndigis ; n++)
1107                         srose.srose_digis[n] = rose->dest_digis[n];
1108         }
1109
1110         /* Build a packet */
1111         /* Sanity check the packet size */
1112         if (len > 65535)
1113                 return -EMSGSIZE;
1114
1115         size = len + AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN;
1116
1117         if ((skb = sock_alloc_send_skb(sk, size, msg->msg_flags & MSG_DONTWAIT, &err)) == NULL)
1118                 return err;
1119
1120         skb_reserve(skb, AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN);
1121
1122         /*
1123          *      Put the data on the end
1124          */
1125
1126         skb_reset_transport_header(skb);
1127         skb_put(skb, len);
1128
1129         err = memcpy_fromiovec(skb_transport_header(skb), msg->msg_iov, len);
1130         if (err) {
1131                 kfree_skb(skb);
1132                 return err;
1133         }
1134
1135         /*
1136          *      If the Q BIT Include socket option is in force, the first
1137          *      byte of the user data is the logical value of the Q Bit.
1138          */
1139         if (rose->qbitincl) {
1140                 qbit = skb->data[0];
1141                 skb_pull(skb, 1);
1142         }
1143
1144         /*
1145          *      Push down the ROSE header
1146          */
1147         asmptr = skb_push(skb, ROSE_MIN_LEN);
1148
1149         /* Build a ROSE Network header */
1150         asmptr[0] = ((rose->lci >> 8) & 0x0F) | ROSE_GFI;
1151         asmptr[1] = (rose->lci >> 0) & 0xFF;
1152         asmptr[2] = ROSE_DATA;
1153
1154         if (qbit)
1155                 asmptr[0] |= ROSE_Q_BIT;
1156
1157         if (sk->sk_state != TCP_ESTABLISHED) {
1158                 kfree_skb(skb);
1159                 return -ENOTCONN;
1160         }
1161
1162 #ifdef M_BIT
1163 #define ROSE_PACLEN (256-ROSE_MIN_LEN)
1164         if (skb->len - ROSE_MIN_LEN > ROSE_PACLEN) {
1165                 unsigned char header[ROSE_MIN_LEN];
1166                 struct sk_buff *skbn;
1167                 int frontlen;
1168                 int lg;
1169
1170                 /* Save a copy of the Header */
1171                 skb_copy_from_linear_data(skb, header, ROSE_MIN_LEN);
1172                 skb_pull(skb, ROSE_MIN_LEN);
1173
1174                 frontlen = skb_headroom(skb);
1175
1176                 while (skb->len > 0) {
1177                         if ((skbn = sock_alloc_send_skb(sk, frontlen + ROSE_PACLEN, 0, &err)) == NULL) {
1178                                 kfree_skb(skb);
1179                                 return err;
1180                         }
1181
1182                         skbn->sk   = sk;
1183                         skbn->free = 1;
1184                         skbn->arp  = 1;
1185
1186                         skb_reserve(skbn, frontlen);
1187
1188                         lg = (ROSE_PACLEN > skb->len) ? skb->len : ROSE_PACLEN;
1189
1190                         /* Copy the user data */
1191                         skb_copy_from_linear_data(skb, skb_put(skbn, lg), lg);
1192                         skb_pull(skb, lg);
1193
1194                         /* Duplicate the Header */
1195                         skb_push(skbn, ROSE_MIN_LEN);
1196                         skb_copy_to_linear_data(skbn, header, ROSE_MIN_LEN);
1197
1198                         if (skb->len > 0)
1199                                 skbn->data[2] |= M_BIT;
1200
1201                         skb_queue_tail(&sk->sk_write_queue, skbn); /* Throw it on the queue */
1202                 }
1203
1204                 skb->free = 1;
1205                 kfree_skb(skb);
1206         } else {
1207                 skb_queue_tail(&sk->sk_write_queue, skb);               /* Throw it on the queue */
1208         }
1209 #else
1210         skb_queue_tail(&sk->sk_write_queue, skb);       /* Shove it onto the queue */
1211 #endif
1212
1213         rose_kick(sk);
1214
1215         return len;
1216 }
1217
1218
1219 static int rose_recvmsg(struct kiocb *iocb, struct socket *sock,
1220                         struct msghdr *msg, size_t size, int flags)
1221 {
1222         struct sock *sk = sock->sk;
1223         struct rose_sock *rose = rose_sk(sk);
1224         struct sockaddr_rose *srose = (struct sockaddr_rose *)msg->msg_name;
1225         size_t copied;
1226         unsigned char *asmptr;
1227         struct sk_buff *skb;
1228         int n, er, qbit;
1229
1230         /*
1231          * This works for seqpacket too. The receiver has ordered the queue for
1232          * us! We do one quick check first though
1233          */
1234         if (sk->sk_state != TCP_ESTABLISHED)
1235                 return -ENOTCONN;
1236
1237         /* Now we can treat all alike */
1238         if ((skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, flags & MSG_DONTWAIT, &er)) == NULL)
1239                 return er;
1240
1241         qbit = (skb->data[0] & ROSE_Q_BIT) == ROSE_Q_BIT;
1242
1243         skb_pull(skb, ROSE_MIN_LEN);
1244
1245         if (rose->qbitincl) {
1246                 asmptr  = skb_push(skb, 1);
1247                 *asmptr = qbit;
1248         }
1249
1250         skb_reset_transport_header(skb);
1251         copied     = skb->len;
1252
1253         if (copied > size) {
1254                 copied = size;
1255                 msg->msg_flags |= MSG_TRUNC;
1256         }
1257
1258         skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
1259
1260         if (srose != NULL) {
1261                 srose->srose_family = AF_ROSE;
1262                 srose->srose_addr   = rose->dest_addr;
1263                 srose->srose_call   = rose->dest_call;
1264                 srose->srose_ndigis = rose->dest_ndigis;
1265                 if (msg->msg_namelen >= sizeof(struct full_sockaddr_rose)) {
1266                         struct full_sockaddr_rose *full_srose = (struct full_sockaddr_rose *)msg->msg_name;
1267                         for (n = 0 ; n < rose->dest_ndigis ; n++)
1268                                 full_srose->srose_digis[n] = rose->dest_digis[n];
1269                         msg->msg_namelen = sizeof(struct full_sockaddr_rose);
1270                 } else {
1271                         if (rose->dest_ndigis >= 1) {
1272                                 srose->srose_ndigis = 1;
1273                                 srose->srose_digi = rose->dest_digis[0];
1274                         }
1275                         msg->msg_namelen = sizeof(struct sockaddr_rose);
1276                 }
1277         }
1278
1279         skb_free_datagram(sk, skb);
1280
1281         return copied;
1282 }
1283
1284
1285 static int rose_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1286 {
1287         struct sock *sk = sock->sk;
1288         struct rose_sock *rose = rose_sk(sk);
1289         void __user *argp = (void __user *)arg;
1290
1291         switch (cmd) {
1292         case TIOCOUTQ: {
1293                 long amount;
1294
1295                 amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk);
1296                 if (amount < 0)
1297                         amount = 0;
1298                 return put_user(amount, (unsigned int __user *) argp);
1299         }
1300
1301         case TIOCINQ: {
1302                 struct sk_buff *skb;
1303                 long amount = 0L;
1304                 /* These two are safe on a single CPU system as only user tasks fiddle here */
1305                 if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL)
1306                         amount = skb->len;
1307                 return put_user(amount, (unsigned int __user *) argp);
1308         }
1309
1310         case SIOCGSTAMP:
1311                 return sock_get_timestamp(sk, (struct timeval __user *) argp);
1312
1313         case SIOCGSTAMPNS:
1314                 return sock_get_timestampns(sk, (struct timespec __user *) argp);
1315
1316         case SIOCGIFADDR:
1317         case SIOCSIFADDR:
1318         case SIOCGIFDSTADDR:
1319         case SIOCSIFDSTADDR:
1320         case SIOCGIFBRDADDR:
1321         case SIOCSIFBRDADDR:
1322         case SIOCGIFNETMASK:
1323         case SIOCSIFNETMASK:
1324         case SIOCGIFMETRIC:
1325         case SIOCSIFMETRIC:
1326                 return -EINVAL;
1327
1328         case SIOCADDRT:
1329         case SIOCDELRT:
1330         case SIOCRSCLRRT:
1331                 if (!capable(CAP_NET_ADMIN))
1332                         return -EPERM;
1333                 return rose_rt_ioctl(cmd, argp);
1334
1335         case SIOCRSGCAUSE: {
1336                 struct rose_cause_struct rose_cause;
1337                 rose_cause.cause      = rose->cause;
1338                 rose_cause.diagnostic = rose->diagnostic;
1339                 return copy_to_user(argp, &rose_cause, sizeof(struct rose_cause_struct)) ? -EFAULT : 0;
1340         }
1341
1342         case SIOCRSSCAUSE: {
1343                 struct rose_cause_struct rose_cause;
1344                 if (copy_from_user(&rose_cause, argp, sizeof(struct rose_cause_struct)))
1345                         return -EFAULT;
1346                 rose->cause      = rose_cause.cause;
1347                 rose->diagnostic = rose_cause.diagnostic;
1348                 return 0;
1349         }
1350
1351         case SIOCRSSL2CALL:
1352                 if (!capable(CAP_NET_ADMIN)) return -EPERM;
1353                 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1354                         ax25_listen_release(&rose_callsign, NULL);
1355                 if (copy_from_user(&rose_callsign, argp, sizeof(ax25_address)))
1356                         return -EFAULT;
1357                 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1358                         return ax25_listen_register(&rose_callsign, NULL);
1359
1360                 return 0;
1361
1362         case SIOCRSGL2CALL:
1363                 return copy_to_user(argp, &rose_callsign, sizeof(ax25_address)) ? -EFAULT : 0;
1364
1365         case SIOCRSACCEPT:
1366                 if (rose->state == ROSE_STATE_5) {
1367                         rose_write_internal(sk, ROSE_CALL_ACCEPTED);
1368                         rose_start_idletimer(sk);
1369                         rose->condition = 0x00;
1370                         rose->vs        = 0;
1371                         rose->va        = 0;
1372                         rose->vr        = 0;
1373                         rose->vl        = 0;
1374                         rose->state     = ROSE_STATE_3;
1375                 }
1376                 return 0;
1377
1378         default:
1379                 return -ENOIOCTLCMD;
1380         }
1381
1382         return 0;
1383 }
1384
1385 #ifdef CONFIG_PROC_FS
1386 static void *rose_info_start(struct seq_file *seq, loff_t *pos)
1387         __acquires(rose_list_lock)
1388 {
1389         spin_lock_bh(&rose_list_lock);
1390         return seq_hlist_start_head(&rose_list, *pos);
1391 }
1392
1393 static void *rose_info_next(struct seq_file *seq, void *v, loff_t *pos)
1394 {
1395         return seq_hlist_next(v, &rose_list, pos);
1396 }
1397
1398 static void rose_info_stop(struct seq_file *seq, void *v)
1399         __releases(rose_list_lock)
1400 {
1401         spin_unlock_bh(&rose_list_lock);
1402 }
1403
1404 static int rose_info_show(struct seq_file *seq, void *v)
1405 {
1406         char buf[11], rsbuf[11];
1407
1408         if (v == SEQ_START_TOKEN)
1409                 seq_puts(seq,
1410                          "dest_addr  dest_call src_addr   src_call  dev   lci neigh st vs vr va   t  t1  t2  t3  hb    idle Snd-Q Rcv-Q inode\n");
1411
1412         else {
1413                 struct sock *s = sk_entry(v);
1414                 struct rose_sock *rose = rose_sk(s);
1415                 const char *devname, *callsign;
1416                 const struct net_device *dev = rose->device;
1417
1418                 if (!dev)
1419                         devname = "???";
1420                 else
1421                         devname = dev->name;
1422
1423                 seq_printf(seq, "%-10s %-9s ",
1424                            rose2asc(rsbuf, &rose->dest_addr),
1425                            ax2asc(buf, &rose->dest_call));
1426
1427                 if (ax25cmp(&rose->source_call, &null_ax25_address) == 0)
1428                         callsign = "??????-?";
1429                 else
1430                         callsign = ax2asc(buf, &rose->source_call);
1431
1432                 seq_printf(seq,
1433                            "%-10s %-9s %-5s %3.3X %05d  %d  %d  %d  %d %3lu %3lu %3lu %3lu %3lu %3lu/%03lu %5d %5d %ld\n",
1434                         rose2asc(rsbuf, &rose->source_addr),
1435                         callsign,
1436                         devname,
1437                         rose->lci & 0x0FFF,
1438                         (rose->neighbour) ? rose->neighbour->number : 0,
1439                         rose->state,
1440                         rose->vs,
1441                         rose->vr,
1442                         rose->va,
1443                         ax25_display_timer(&rose->timer) / HZ,
1444                         rose->t1 / HZ,
1445                         rose->t2 / HZ,
1446                         rose->t3 / HZ,
1447                         rose->hb / HZ,
1448                         ax25_display_timer(&rose->idletimer) / (60 * HZ),
1449                         rose->idle / (60 * HZ),
1450                         sk_wmem_alloc_get(s),
1451                         sk_rmem_alloc_get(s),
1452                         s->sk_socket ? SOCK_INODE(s->sk_socket)->i_ino : 0L);
1453         }
1454
1455         return 0;
1456 }
1457
1458 static const struct seq_operations rose_info_seqops = {
1459         .start = rose_info_start,
1460         .next = rose_info_next,
1461         .stop = rose_info_stop,
1462         .show = rose_info_show,
1463 };
1464
1465 static int rose_info_open(struct inode *inode, struct file *file)
1466 {
1467         return seq_open(file, &rose_info_seqops);
1468 }
1469
1470 static const struct file_operations rose_info_fops = {
1471         .owner = THIS_MODULE,
1472         .open = rose_info_open,
1473         .read = seq_read,
1474         .llseek = seq_lseek,
1475         .release = seq_release,
1476 };
1477 #endif  /* CONFIG_PROC_FS */
1478
1479 static const struct net_proto_family rose_family_ops = {
1480         .family         =       PF_ROSE,
1481         .create         =       rose_create,
1482         .owner          =       THIS_MODULE,
1483 };
1484
1485 static const struct proto_ops rose_proto_ops = {
1486         .family         =       PF_ROSE,
1487         .owner          =       THIS_MODULE,
1488         .release        =       rose_release,
1489         .bind           =       rose_bind,
1490         .connect        =       rose_connect,
1491         .socketpair     =       sock_no_socketpair,
1492         .accept         =       rose_accept,
1493         .getname        =       rose_getname,
1494         .poll           =       datagram_poll,
1495         .ioctl          =       rose_ioctl,
1496         .listen         =       rose_listen,
1497         .shutdown       =       sock_no_shutdown,
1498         .setsockopt     =       rose_setsockopt,
1499         .getsockopt     =       rose_getsockopt,
1500         .sendmsg        =       rose_sendmsg,
1501         .recvmsg        =       rose_recvmsg,
1502         .mmap           =       sock_no_mmap,
1503         .sendpage       =       sock_no_sendpage,
1504 };
1505
1506 static struct notifier_block rose_dev_notifier = {
1507         .notifier_call  =       rose_device_event,
1508 };
1509
1510 static struct net_device **dev_rose;
1511
1512 static struct ax25_protocol rose_pid = {
1513         .pid    = AX25_P_ROSE,
1514         .func   = rose_route_frame
1515 };
1516
1517 static struct ax25_linkfail rose_linkfail_notifier = {
1518         .func   = rose_link_failed
1519 };
1520
1521 static int __init rose_proto_init(void)
1522 {
1523         int i;
1524         int rc;
1525
1526         if (rose_ndevs > 0x7FFFFFFF/sizeof(struct net_device *)) {
1527                 printk(KERN_ERR "ROSE: rose_proto_init - rose_ndevs parameter to large\n");
1528                 rc = -EINVAL;
1529                 goto out;
1530         }
1531
1532         rc = proto_register(&rose_proto, 0);
1533         if (rc != 0)
1534                 goto out;
1535
1536         rose_callsign = null_ax25_address;
1537
1538         dev_rose = kzalloc(rose_ndevs * sizeof(struct net_device *), GFP_KERNEL);
1539         if (dev_rose == NULL) {
1540                 printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate device structure\n");
1541                 rc = -ENOMEM;
1542                 goto out_proto_unregister;
1543         }
1544
1545         for (i = 0; i < rose_ndevs; i++) {
1546                 struct net_device *dev;
1547                 char name[IFNAMSIZ];
1548
1549                 sprintf(name, "rose%d", i);
1550                 dev = alloc_netdev(0, name, rose_setup);
1551                 if (!dev) {
1552                         printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate memory\n");
1553                         rc = -ENOMEM;
1554                         goto fail;
1555                 }
1556                 rc = register_netdev(dev);
1557                 if (rc) {
1558                         printk(KERN_ERR "ROSE: netdevice registration failed\n");
1559                         free_netdev(dev);
1560                         goto fail;
1561                 }
1562                 rose_set_lockdep_key(dev);
1563                 dev_rose[i] = dev;
1564         }
1565
1566         sock_register(&rose_family_ops);
1567         register_netdevice_notifier(&rose_dev_notifier);
1568
1569         ax25_register_pid(&rose_pid);
1570         ax25_linkfail_register(&rose_linkfail_notifier);
1571
1572 #ifdef CONFIG_SYSCTL
1573         rose_register_sysctl();
1574 #endif
1575         rose_loopback_init();
1576
1577         rose_add_loopback_neigh();
1578
1579         proc_net_fops_create(&init_net, "rose", S_IRUGO, &rose_info_fops);
1580         proc_net_fops_create(&init_net, "rose_neigh", S_IRUGO, &rose_neigh_fops);
1581         proc_net_fops_create(&init_net, "rose_nodes", S_IRUGO, &rose_nodes_fops);
1582         proc_net_fops_create(&init_net, "rose_routes", S_IRUGO, &rose_routes_fops);
1583 out:
1584         return rc;
1585 fail:
1586         while (--i >= 0) {
1587                 unregister_netdev(dev_rose[i]);
1588                 free_netdev(dev_rose[i]);
1589         }
1590         kfree(dev_rose);
1591 out_proto_unregister:
1592         proto_unregister(&rose_proto);
1593         goto out;
1594 }
1595 module_init(rose_proto_init);
1596
1597 module_param(rose_ndevs, int, 0);
1598 MODULE_PARM_DESC(rose_ndevs, "number of ROSE devices");
1599
1600 MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>");
1601 MODULE_DESCRIPTION("The amateur radio ROSE network layer protocol");
1602 MODULE_LICENSE("GPL");
1603 MODULE_ALIAS_NETPROTO(PF_ROSE);
1604
1605 static void __exit rose_exit(void)
1606 {
1607         int i;
1608
1609         proc_net_remove(&init_net, "rose");
1610         proc_net_remove(&init_net, "rose_neigh");
1611         proc_net_remove(&init_net, "rose_nodes");
1612         proc_net_remove(&init_net, "rose_routes");
1613         rose_loopback_clear();
1614
1615         rose_rt_free();
1616
1617         ax25_protocol_release(AX25_P_ROSE);
1618         ax25_linkfail_release(&rose_linkfail_notifier);
1619
1620         if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1621                 ax25_listen_release(&rose_callsign, NULL);
1622
1623 #ifdef CONFIG_SYSCTL
1624         rose_unregister_sysctl();
1625 #endif
1626         unregister_netdevice_notifier(&rose_dev_notifier);
1627
1628         sock_unregister(PF_ROSE);
1629
1630         for (i = 0; i < rose_ndevs; i++) {
1631                 struct net_device *dev = dev_rose[i];
1632
1633                 if (dev) {
1634                         unregister_netdev(dev);
1635                         free_netdev(dev);
1636                 }
1637         }
1638
1639         kfree(dev_rose);
1640         proto_unregister(&rose_proto);
1641 }
1642
1643 module_exit(rose_exit);