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/signal.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 <linux/uaccess.h>
  38 #include <linux/fcntl.h>
  39 #include <linux/termios.h>
  40 #include <linux/mm.h>
  41 #include <linux/interrupt.h>
  42 #include <linux/notifier.h>
  43 #include <net/rose.h>
  44 #include <linux/proc_fs.h>
  45 #include <linux/seq_file.h>
  46 #include <net/tcp_states.h>
  47 #include <net/ip.h>
  48 #include <net/arp.h>
  49
  50 static int rose_ndevs = 10;
  51
  52 int sysctl_rose_restart_request_timeout = ROSE_DEFAULT_T0;
  53 int sysctl_rose_call_request_timeout    = ROSE_DEFAULT_T1;
  54 int sysctl_rose_reset_request_timeout   = ROSE_DEFAULT_T2;
  55 int sysctl_rose_clear_request_timeout   = ROSE_DEFAULT_T3;
  56 int sysctl_rose_no_activity_timeout     = ROSE_DEFAULT_IDLE;
  57 int sysctl_rose_ack_hold_back_timeout   = ROSE_DEFAULT_HB;
  58 int sysctl_rose_routing_control         = ROSE_DEFAULT_ROUTING;
  59 int sysctl_rose_link_fail_timeout       = ROSE_DEFAULT_FAIL_TIMEOUT;
  60 int sysctl_rose_maximum_vcs             = ROSE_DEFAULT_MAXVC;
  61 int sysctl_rose_window_size             = ROSE_DEFAULT_WINDOW_SIZE;
  62
  63 static HLIST_HEAD(rose_list);
  64 static DEFINE_SPINLOCK(rose_list_lock);
  65
  66 static const struct proto_ops rose_proto_ops;
  67
  68 ax25_address rose_callsign;
  69
  70 /*
  71  * ROSE network devices are virtual network devices encapsulating ROSE
  72  * frames into AX.25 which will be sent through an AX.25 device, so form a
  73  * special "super class" of normal net devices; split their locks off into a
  74  * separate class since they always nest.
  75  */
  76 static struct lock_class_key rose_netdev_xmit_lock_key;
  77 static struct lock_class_key rose_netdev_addr_lock_key;
  78
  79 static void rose_set_lockdep_one(struct net_device *dev,
  80                                  struct netdev_queue *txq,
  81                                  void *_unused)
  82 {
  83         lockdep_set_class(&txq->_xmit_lock, &rose_netdev_xmit_lock_key);
  84 }
  85
  86 static void rose_set_lockdep_key(struct net_device *dev)
  87 {
  88         lockdep_set_class(&dev->addr_list_lock, &rose_netdev_addr_lock_key);
  89         netdev_for_each_tx_queue(dev, rose_set_lockdep_one, NULL);
  90 }
  91
  92 /*
  93  *      Convert a ROSE address into text.
  94  */
  95 char *rose2asc(char *buf, const rose_address *addr)
  96 {
  97         if (addr->rose_addr[0] == 0x00 && addr->rose_addr[1] == 0x00 &&
  98             addr->rose_addr[2] == 0x00 && addr->rose_addr[3] == 0x00 &&
  99             addr->rose_addr[4] == 0x00) {
 100                 strcpy(buf, "*");
 101         } else {
 102                 sprintf(buf, "%02X%02X%02X%02X%02X", addr->rose_addr[0] & 0xFF,
 103                                                 addr->rose_addr[1] & 0xFF,
 104                                                 addr->rose_addr[2] & 0xFF,
 105                                                 addr->rose_addr[3] & 0xFF,
 106                                                 addr->rose_addr[4] & 0xFF);
 107         }
 108
 109         return buf;
 110 }
 111
 112 /*
 113  *      Compare two ROSE addresses, 0 == equal.
 114  */
 115 int rosecmp(rose_address *addr1, rose_address *addr2)
 116 {
 117         int i;
 118
 119         for (i = 0; i < 5; i++)
 120                 if (addr1->rose_addr[i] != addr2->rose_addr[i])
 121                         return 1;
 122
 123         return 0;
 124 }
 125
 126 /*
 127  *      Compare two ROSE addresses for only mask digits, 0 == equal.
 128  */
 129 int rosecmpm(rose_address *addr1, rose_address *addr2, unsigned short mask)
 130 {
 131         unsigned int i, j;
 132
 133         if (mask > 10)
 134                 return 1;
 135
 136         for (i = 0; i < mask; i++) {
 137                 j = i / 2;
 138
 139                 if ((i % 2) != 0) {
 140                         if ((addr1->rose_addr[j] & 0x0F) != (addr2->rose_addr[j] & 0x0F))
 141                                 return 1;
 142                 } else {
 143                         if ((addr1->rose_addr[j] & 0xF0) != (addr2->rose_addr[j] & 0xF0))
 144                                 return 1;
 145                 }
 146         }
 147
 148         return 0;
 149 }
 150
 151 /*
 152  *      Socket removal during an interrupt is now safe.
 153  */
 154 static void rose_remove_socket(struct sock *sk)
 155 {
 156         spin_lock_bh(&rose_list_lock);
 157         sk_del_node_init(sk);
 158         spin_unlock_bh(&rose_list_lock);
 159 }
 160
 161 /*
 162  *      Kill all bound sockets on a broken link layer connection to a
 163  *      particular neighbour.
 164  */
 165 void rose_kill_by_neigh(struct rose_neigh *neigh)
 166 {
 167         struct sock *s;
 168
 169         spin_lock_bh(&rose_list_lock);
 170         sk_for_each(s, &rose_list) {
 171                 struct rose_sock *rose = rose_sk(s);
 172
 173                 if (rose->neighbour == neigh) {
 174                         rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0);
 175                         rose->neighbour->use--;
 176                         rose->neighbour = NULL;
 177                 }
 178         }
 179         spin_unlock_bh(&rose_list_lock);
 180 }
 181
 182 /*
 183  *      Kill all bound sockets on a dropped device.
 184  */
 185 static void rose_kill_by_device(struct net_device *dev)
 186 {
 187         struct sock *s;
 188
 189         spin_lock_bh(&rose_list_lock);
 190         sk_for_each(s, &rose_list) {
 191                 struct rose_sock *rose = rose_sk(s);
 192
 193                 if (rose->device == dev) {
 194                         rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0);
 195                         if (rose->neighbour)
 196                                 rose->neighbour->use--;
 197                         dev_put(rose->device);
 198                         rose->device = NULL;
 199                 }
 200         }
 201         spin_unlock_bh(&rose_list_lock);
 202 }
 203
 204 /*
 205  *      Handle device status changes.
 206  */
 207 static int rose_device_event(struct notifier_block *this,
 208                              unsigned long event, void *ptr)
 209 {
 210         struct net_device *dev = netdev_notifier_info_to_dev(ptr);
 211
 212         if (!net_eq(dev_net(dev), &init_net))
 213                 return NOTIFY_DONE;
 214
 215         if (event != NETDEV_DOWN)
 216                 return NOTIFY_DONE;
 217
 218         switch (dev->type) {
 219         case ARPHRD_ROSE:
 220                 rose_kill_by_device(dev);
 221                 break;
 222         case ARPHRD_AX25:
 223                 rose_link_device_down(dev);
 224                 rose_rt_device_down(dev);
 225                 break;
 226         }
 227
 228         return NOTIFY_DONE;
 229 }
 230
 231 /*
 232  *      Add a socket to the bound sockets list.
 233  */
 234 static void rose_insert_socket(struct sock *sk)
 235 {
 236
 237         spin_lock_bh(&rose_list_lock);
 238         sk_add_node(sk, &rose_list);
 239         spin_unlock_bh(&rose_list_lock);
 240 }
 241
 242 /*
 243  *      Find a socket that wants to accept the Call Request we just
 244  *      received.
 245  */
 246 static struct sock *rose_find_listener(rose_address *addr, ax25_address *call)
 247 {
 248         struct sock *s;
 249
 250         spin_lock_bh(&rose_list_lock);
 251         sk_for_each(s, &rose_list) {
 252                 struct rose_sock *rose = rose_sk(s);
 253
 254                 if (!rosecmp(&rose->source_addr, addr) &&
 255                     !ax25cmp(&rose->source_call, call) &&
 256                     !rose->source_ndigis && s->sk_state == TCP_LISTEN)
 257                         goto found;
 258         }
 259
 260         sk_for_each(s, &rose_list) {
 261                 struct rose_sock *rose = rose_sk(s);
 262
 263                 if (!rosecmp(&rose->source_addr, addr) &&
 264                     !ax25cmp(&rose->source_call, &null_ax25_address) &&
 265                     s->sk_state == TCP_LISTEN)
 266                         goto found;
 267         }
 268         s = NULL;
 269 found:
 270         spin_unlock_bh(&rose_list_lock);
 271         return s;
 272 }
 273
 274 /*
 275  *      Find a connected ROSE socket given my LCI and device.
 276  */
 277 struct sock *rose_find_socket(unsigned int lci, struct rose_neigh *neigh)
 278 {
 279         struct sock *s;
 280
 281         spin_lock_bh(&rose_list_lock);
 282         sk_for_each(s, &rose_list) {
 283                 struct rose_sock *rose = rose_sk(s);
 284
 285                 if (rose->lci == lci && rose->neighbour == neigh)
 286                         goto found;
 287         }
 288         s = NULL;
 289 found:
 290         spin_unlock_bh(&rose_list_lock);
 291         return s;
 292 }
 293
 294 /*
 295  *      Find a unique LCI for a given device.
 296  */
 297 unsigned int rose_new_lci(struct rose_neigh *neigh)
 298 {
 299         int lci;
 300
 301         if (neigh->dce_mode) {
 302                 for (lci = 1; lci <= sysctl_rose_maximum_vcs; lci++)
 303                         if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL)
 304                                 return lci;
 305         } else {
 306                 for (lci = sysctl_rose_maximum_vcs; lci > 0; lci--)
 307                         if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL)
 308                                 return lci;
 309         }
 310
 311         return 0;
 312 }
 313
 314 /*
 315  *      Deferred destroy.
 316  */
 317 void rose_destroy_socket(struct sock *);
 318
 319 /*
 320  *      Handler for deferred kills.
 321  */
 322 static void rose_destroy_timer(struct timer_list *t)
 323 {
 324         struct sock *sk = from_timer(sk, t, sk_timer);
 325
 326         rose_destroy_socket(sk);
 327 }
 328
 329 /*
 330  *      This is called from user mode and the timers. Thus it protects itself
 331  *      against interrupt users but doesn't worry about being called during
 332  *      work.  Once it is removed from the queue no interrupt or bottom half
 333  *      will touch it and we are (fairly 8-) ) safe.
 334  */
 335 void rose_destroy_socket(struct sock *sk)
 336 {
 337         struct sk_buff *skb;
 338
 339         rose_remove_socket(sk);
 340         rose_stop_heartbeat(sk);
 341         rose_stop_idletimer(sk);
 342         rose_stop_timer(sk);
 343
 344         rose_clear_queues(sk);          /* Flush the queues */
 345
 346         while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) {
 347                 if (skb->sk != sk) {    /* A pending connection */
 348                         /* Queue the unaccepted socket for death */
 349                         sock_set_flag(skb->sk, SOCK_DEAD);
 350                         rose_start_heartbeat(skb->sk);
 351                         rose_sk(skb->sk)->state = ROSE_STATE_0;
 352                 }
 353
 354                 kfree_skb(skb);
 355         }
 356
 357         if (sk_has_allocations(sk)) {
 358                 /* Defer: outstanding buffers */
 359                 timer_setup(&sk->sk_timer, rose_destroy_timer, 0);
 360                 sk->sk_timer.expires  = jiffies + 10 * HZ;
 361                 add_timer(&sk->sk_timer);
 362         } else
 363                 sock_put(sk);
 364 }
 365
 366 /*
 367  *      Handling for system calls applied via the various interfaces to a
 368  *      ROSE socket object.
 369  */
 370
 371 static int rose_setsockopt(struct socket *sock, int level, int optname,
 372         char __user *optval, unsigned int optlen)
 373 {
 374         struct sock *sk = sock->sk;
 375         struct rose_sock *rose = rose_sk(sk);
 376         int opt;
 377
 378         if (level != SOL_ROSE)
 379                 return -ENOPROTOOPT;
 380
 381         if (optlen < sizeof(int))
 382                 return -EINVAL;
 383
 384         if (get_user(opt, (int __user *)optval))
 385                 return -EFAULT;
 386
 387         switch (optname) {
 388         case ROSE_DEFER:
 389                 rose->defer = opt ? 1 : 0;
 390                 return 0;
 391
 392         case ROSE_T1:
 393                 if (opt < 1)
 394                         return -EINVAL;
 395                 rose->t1 = opt * HZ;
 396                 return 0;
 397
 398         case ROSE_T2:
 399                 if (opt < 1)
 400                         return -EINVAL;
 401                 rose->t2 = opt * HZ;
 402                 return 0;
 403
 404         case ROSE_T3:
 405                 if (opt < 1)
 406                         return -EINVAL;
 407                 rose->t3 = opt * HZ;
 408                 return 0;
 409
 410         case ROSE_HOLDBACK:
 411                 if (opt < 1)
 412                         return -EINVAL;
 413                 rose->hb = opt * HZ;
 414                 return 0;
 415
 416         case ROSE_IDLE:
 417                 if (opt < 0)
 418                         return -EINVAL;
 419                 rose->idle = opt * 60 * HZ;
 420                 return 0;
 421
 422         case ROSE_QBITINCL:
 423                 rose->qbitincl = opt ? 1 : 0;
 424                 return 0;
 425
 426         default:
 427                 return -ENOPROTOOPT;
 428         }
 429 }
 430
 431 static int rose_getsockopt(struct socket *sock, int level, int optname,
 432         char __user *optval, int __user *optlen)
 433 {
 434         struct sock *sk = sock->sk;
 435         struct rose_sock *rose = rose_sk(sk);
 436         int val = 0;
 437         int len;
 438
 439         if (level != SOL_ROSE)
 440                 return -ENOPROTOOPT;
 441
 442         if (get_user(len, optlen))
 443                 return -EFAULT;
 444
 445         if (len < 0)
 446                 return -EINVAL;
 447
 448         switch (optname) {
 449         case ROSE_DEFER:
 450                 val = rose->defer;
 451                 break;
 452
 453         case ROSE_T1:
 454                 val = rose->t1 / HZ;
 455                 break;
 456
 457         case ROSE_T2:
 458                 val = rose->t2 / HZ;
 459                 break;
 460
 461         case ROSE_T3:
 462                 val = rose->t3 / HZ;
 463                 break;
 464
 465         case ROSE_HOLDBACK:
 466                 val = rose->hb / HZ;
 467                 break;
 468
 469         case ROSE_IDLE:
 470                 val = rose->idle / (60 * HZ);
 471                 break;
 472
 473         case ROSE_QBITINCL:
 474                 val = rose->qbitincl;
 475                 break;
 476
 477         default:
 478                 return -ENOPROTOOPT;
 479         }
 480
 481         len = min_t(unsigned int, len, sizeof(int));
 482
 483         if (put_user(len, optlen))
 484                 return -EFAULT;
 485
 486         return copy_to_user(optval, &val, len) ? -EFAULT : 0;
 487 }
 488
 489 static int rose_listen(struct socket *sock, int backlog)
 490 {
 491         struct sock *sk = sock->sk;
 492
 493         if (sk->sk_state != TCP_LISTEN) {
 494                 struct rose_sock *rose = rose_sk(sk);
 495
 496                 rose->dest_ndigis = 0;
 497                 memset(&rose->dest_addr, 0, ROSE_ADDR_LEN);
 498                 memset(&rose->dest_call, 0, AX25_ADDR_LEN);
 499                 memset(rose->dest_digis, 0, AX25_ADDR_LEN * ROSE_MAX_DIGIS);
 500                 sk->sk_max_ack_backlog = backlog;
 501                 sk->sk_state           = TCP_LISTEN;
 502                 return 0;
 503         }
 504
 505         return -EOPNOTSUPP;
 506 }
 507
 508 static struct proto rose_proto = {
 509         .name     = "ROSE",
 510         .owner    = THIS_MODULE,
 511         .obj_size = sizeof(struct rose_sock),
 512 };
 513
 514 static int rose_create(struct net *net, struct socket *sock, int protocol,
 515                        int kern)
 516 {
 517         struct sock *sk;
 518         struct rose_sock *rose;
 519
 520         if (!net_eq(net, &init_net))
 521                 return -EAFNOSUPPORT;
 522
 523         if (sock->type != SOCK_SEQPACKET || protocol != 0)
 524                 return -ESOCKTNOSUPPORT;
 525
 526         sk = sk_alloc(net, PF_ROSE, GFP_ATOMIC, &rose_proto, kern);
 527         if (sk == NULL)
 528                 return -ENOMEM;
 529
 530         rose = rose_sk(sk);
 531
 532         sock_init_data(sock, sk);
 533
 534         skb_queue_head_init(&rose->ack_queue);
 535 #ifdef M_BIT
 536         skb_queue_head_init(&rose->frag_queue);
 537         rose->fraglen    = 0;
 538 #endif
 539
 540         sock->ops    = &rose_proto_ops;
 541         sk->sk_protocol = protocol;
 542
 543         timer_setup(&rose->timer, NULL, 0);
 544         timer_setup(&rose->idletimer, NULL, 0);
 545
 546         rose->t1   = msecs_to_jiffies(sysctl_rose_call_request_timeout);
 547         rose->t2   = msecs_to_jiffies(sysctl_rose_reset_request_timeout);
 548         rose->t3   = msecs_to_jiffies(sysctl_rose_clear_request_timeout);
 549         rose->hb   = msecs_to_jiffies(sysctl_rose_ack_hold_back_timeout);
 550         rose->idle = msecs_to_jiffies(sysctl_rose_no_activity_timeout);
 551
 552         rose->state = ROSE_STATE_0;
 553
 554         return 0;
 555 }
 556
 557 static struct sock *rose_make_new(struct sock *osk)
 558 {
 559         struct sock *sk;
 560         struct rose_sock *rose, *orose;
 561
 562         if (osk->sk_type != SOCK_SEQPACKET)
 563                 return NULL;
 564
 565         sk = sk_alloc(sock_net(osk), PF_ROSE, GFP_ATOMIC, &rose_proto, 0);
 566         if (sk == NULL)
 567                 return NULL;
 568
 569         rose = rose_sk(sk);
 570
 571         sock_init_data(NULL, sk);
 572
 573         skb_queue_head_init(&rose->ack_queue);
 574 #ifdef M_BIT
 575         skb_queue_head_init(&rose->frag_queue);
 576         rose->fraglen  = 0;
 577 #endif
 578
 579         sk->sk_type     = osk->sk_type;
 580         sk->sk_priority = osk->sk_priority;
 581         sk->sk_protocol = osk->sk_protocol;
 582         sk->sk_rcvbuf   = osk->sk_rcvbuf;
 583         sk->sk_sndbuf   = osk->sk_sndbuf;
 584         sk->sk_state    = TCP_ESTABLISHED;
 585         sock_copy_flags(sk, osk);
 586
 587         timer_setup(&rose->timer, NULL, 0);
 588         timer_setup(&rose->idletimer, NULL, 0);
 589
 590         orose           = rose_sk(osk);
 591         rose->t1        = orose->t1;
 592         rose->t2        = orose->t2;
 593         rose->t3        = orose->t3;
 594         rose->hb        = orose->hb;
 595         rose->idle      = orose->idle;
 596         rose->defer     = orose->defer;
 597         rose->device    = orose->device;
 598         if (rose->device)
 599                 dev_hold(rose->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         dev_put(rose->device);
 654         sock->sk = NULL;
 655         release_sock(sk);
 656         sock_put(sk);
 657
 658         return 0;
 659 }
 660
 661 static int rose_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
 662 {
 663         struct sock *sk = sock->sk;
 664         struct rose_sock *rose = rose_sk(sk);
 665         struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr;
 666         struct net_device *dev;
 667         ax25_address *source;
 668         ax25_uid_assoc *user;
 669         int n;
 670
 671         if (!sock_flag(sk, SOCK_ZAPPED))
 672                 return -EINVAL;
 673
 674         if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose))
 675                 return -EINVAL;
 676
 677         if (addr->srose_family != AF_ROSE)
 678                 return -EINVAL;
 679
 680         if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1)
 681                 return -EINVAL;
 682
 683         if ((unsigned int) addr->srose_ndigis > ROSE_MAX_DIGIS)
 684                 return -EINVAL;
 685
 686         if ((dev = rose_dev_get(&addr->srose_addr)) == NULL)
 687                 return -EADDRNOTAVAIL;
 688
 689         source = &addr->srose_call;
 690
 691         user = ax25_findbyuid(current_euid());
 692         if (user) {
 693                 rose->source_call = user->call;
 694                 ax25_uid_put(user);
 695         } else {
 696                 if (ax25_uid_policy && !capable(CAP_NET_BIND_SERVICE))
 697                         return -EACCES;
 698                 rose->source_call   = *source;
 699         }
 700
 701         rose->source_addr   = addr->srose_addr;
 702         rose->device        = dev;
 703         rose->source_ndigis = addr->srose_ndigis;
 704
 705         if (addr_len == sizeof(struct full_sockaddr_rose)) {
 706                 struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr;
 707                 for (n = 0 ; n < addr->srose_ndigis ; n++)
 708                         rose->source_digis[n] = full_addr->srose_digis[n];
 709         } else {
 710                 if (rose->source_ndigis == 1) {
 711                         rose->source_digis[0] = addr->srose_digi;
 712                 }
 713         }
 714
 715         rose_insert_socket(sk);
 716
 717         sock_reset_flag(sk, SOCK_ZAPPED);
 718
 719         return 0;
 720 }
 721
 722 static int rose_connect(struct socket *sock, struct sockaddr *uaddr, int addr_len, int flags)
 723 {
 724         struct sock *sk = sock->sk;
 725         struct rose_sock *rose = rose_sk(sk);
 726         struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr;
 727         unsigned char cause, diagnostic;
 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                 struct net_device *dev;
 785
 786                 sock_reset_flag(sk, SOCK_ZAPPED);
 787
 788                 dev = rose_dev_first();
 789                 if (!dev) {
 790                         err = -ENETUNREACH;
 791                         goto out_release;
 792                 }
 793
 794                 user = ax25_findbyuid(current_euid());
 795                 if (!user) {
 796                         err = -EINVAL;
 797                         dev_put(dev);
 798                         goto out_release;
 799                 }
 800
 801                 memcpy(&rose->source_addr, dev->dev_addr, ROSE_ADDR_LEN);
 802                 rose->source_call = user->call;
 803                 rose->device      = dev;
 804                 ax25_uid_put(user);
 805
 806                 rose_insert_socket(sk);         /* Finish the bind */
 807         }
 808         rose->dest_addr   = addr->srose_addr;
 809         rose->dest_call   = addr->srose_call;
 810         rose->rand        = ((long)rose & 0xFFFF) + rose->lci;
 811         rose->dest_ndigis = addr->srose_ndigis;
 812
 813         if (addr_len == sizeof(struct full_sockaddr_rose)) {
 814                 struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr;
 815                 for (n = 0 ; n < addr->srose_ndigis ; n++)
 816                         rose->dest_digis[n] = full_addr->srose_digis[n];
 817         } else {
 818                 if (rose->dest_ndigis == 1) {
 819                         rose->dest_digis[0] = addr->srose_digi;
 820                 }
 821         }
 822
 823         /* Move to connecting socket, start sending Connect Requests */
 824         sock->state   = SS_CONNECTING;
 825         sk->sk_state     = TCP_SYN_SENT;
 826
 827         rose->state = ROSE_STATE_1;
 828
 829         rose->neighbour->use++;
 830
 831         rose_write_internal(sk, ROSE_CALL_REQUEST);
 832         rose_start_heartbeat(sk);
 833         rose_start_t1timer(sk);
 834
 835         /* Now the loop */
 836         if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK)) {
 837                 err = -EINPROGRESS;
 838                 goto out_release;
 839         }
 840
 841         /*
 842          * A Connect Ack with Choke or timeout or failed routing will go to
 843          * closed.
 844          */
 845         if (sk->sk_state == TCP_SYN_SENT) {
 846                 DEFINE_WAIT(wait);
 847
 848                 for (;;) {
 849                         prepare_to_wait(sk_sleep(sk), &wait,
 850                                         TASK_INTERRUPTIBLE);
 851                         if (sk->sk_state != TCP_SYN_SENT)
 852                                 break;
 853                         if (!signal_pending(current)) {
 854                                 release_sock(sk);
 855                                 schedule();
 856                                 lock_sock(sk);
 857                                 continue;
 858                         }
 859                         err = -ERESTARTSYS;
 860                         break;
 861                 }
 862                 finish_wait(sk_sleep(sk), &wait);
 863
 864                 if (err)
 865                         goto out_release;
 866         }
 867
 868         if (sk->sk_state != TCP_ESTABLISHED) {
 869                 sock->state = SS_UNCONNECTED;
 870                 err = sock_error(sk);   /* Always set at this point */
 871                 goto out_release;
 872         }
 873
 874         sock->state = SS_CONNECTED;
 875
 876 out_release:
 877         release_sock(sk);
 878
 879         return err;
 880 }
 881
 882 static int rose_accept(struct socket *sock, struct socket *newsock, int flags,
 883                        bool kern)
 884 {
 885         struct sk_buff *skb;
 886         struct sock *newsk;
 887         DEFINE_WAIT(wait);
 888         struct sock *sk;
 889         int err = 0;
 890
 891         if ((sk = sock->sk) == NULL)
 892                 return -EINVAL;
 893
 894         lock_sock(sk);
 895         if (sk->sk_type != SOCK_SEQPACKET) {
 896                 err = -EOPNOTSUPP;
 897                 goto out_release;
 898         }
 899
 900         if (sk->sk_state != TCP_LISTEN) {
 901                 err = -EINVAL;
 902                 goto out_release;
 903         }
 904
 905         /*
 906          *      The write queue this time is holding sockets ready to use
 907          *      hooked into the SABM we saved
 908          */
 909         for (;;) {
 910                 prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
 911
 912                 skb = skb_dequeue(&sk->sk_receive_queue);
 913                 if (skb)
 914                         break;
 915
 916                 if (flags & O_NONBLOCK) {
 917                         err = -EWOULDBLOCK;
 918                         break;
 919                 }
 920                 if (!signal_pending(current)) {
 921                         release_sock(sk);
 922                         schedule();
 923                         lock_sock(sk);
 924                         continue;
 925                 }
 926                 err = -ERESTARTSYS;
 927                 break;
 928         }
 929         finish_wait(sk_sleep(sk), &wait);
 930         if (err)
 931                 goto out_release;
 932
 933         newsk = skb->sk;
 934         sock_graft(newsk, newsock);
 935
 936         /* Now attach up the new socket */
 937         skb->sk = NULL;
 938         kfree_skb(skb);
 939         sk->sk_ack_backlog--;
 940
 941 out_release:
 942         release_sock(sk);
 943
 944         return err;
 945 }
 946
 947 static int rose_getname(struct socket *sock, struct sockaddr *uaddr,
 948         int *uaddr_len, int peer)
 949 {
 950         struct full_sockaddr_rose *srose = (struct full_sockaddr_rose *)uaddr;
 951         struct sock *sk = sock->sk;
 952         struct rose_sock *rose = rose_sk(sk);
 953         int n;
 954
 955         memset(srose, 0, sizeof(*srose));
 956         if (peer != 0) {
 957                 if (sk->sk_state != TCP_ESTABLISHED)
 958                         return -ENOTCONN;
 959                 srose->srose_family = AF_ROSE;
 960                 srose->srose_addr   = rose->dest_addr;
 961                 srose->srose_call   = rose->dest_call;
 962                 srose->srose_ndigis = rose->dest_ndigis;
 963                 for (n = 0; n < rose->dest_ndigis; n++)
 964                         srose->srose_digis[n] = rose->dest_digis[n];
 965         } else {
 966                 srose->srose_family = AF_ROSE;
 967                 srose->srose_addr   = rose->source_addr;
 968                 srose->srose_call   = rose->source_call;
 969                 srose->srose_ndigis = rose->source_ndigis;
 970                 for (n = 0; n < rose->source_ndigis; n++)
 971                         srose->srose_digis[n] = rose->source_digis[n];
 972         }
 973
 974         *uaddr_len = sizeof(struct full_sockaddr_rose);
 975         return 0;
 976 }
 977
 978 int rose_rx_call_request(struct sk_buff *skb, struct net_device *dev, struct rose_neigh *neigh, unsigned int lci)
 979 {
 980         struct sock *sk;
 981         struct sock *make;
 982         struct rose_sock *make_rose;
 983         struct rose_facilities_struct facilities;
 984         int n;
 985
 986         skb->sk = NULL;         /* Initially we don't know who it's for */
 987
 988         /*
 989          *      skb->data points to the rose frame start
 990          */
 991         memset(&facilities, 0x00, sizeof(struct rose_facilities_struct));
 992
 993         if (!rose_parse_facilities(skb->data + ROSE_CALL_REQ_FACILITIES_OFF,
 994                                    skb->len - ROSE_CALL_REQ_FACILITIES_OFF,
 995                                    &facilities)) {
 996                 rose_transmit_clear_request(neigh, lci, ROSE_INVALID_FACILITY, 76);
 997                 return 0;
 998         }
 999
1000         sk = rose_find_listener(&facilities.source_addr, &facilities.source_call);
1001
1002         /*
1003          * We can't accept the Call Request.
1004          */
1005         if (sk == NULL || sk_acceptq_is_full(sk) ||
1006             (make = rose_make_new(sk)) == NULL) {
1007                 rose_transmit_clear_request(neigh, lci, ROSE_NETWORK_CONGESTION, 120);
1008                 return 0;
1009         }
1010
1011         skb->sk     = make;
1012         make->sk_state = TCP_ESTABLISHED;
1013         make_rose = rose_sk(make);
1014
1015         make_rose->lci           = lci;
1016         make_rose->dest_addr     = facilities.dest_addr;
1017         make_rose->dest_call     = facilities.dest_call;
1018         make_rose->dest_ndigis   = facilities.dest_ndigis;
1019         for (n = 0 ; n < facilities.dest_ndigis ; n++)
1020                 make_rose->dest_digis[n] = facilities.dest_digis[n];
1021         make_rose->source_addr   = facilities.source_addr;
1022         make_rose->source_call   = facilities.source_call;
1023         make_rose->source_ndigis = facilities.source_ndigis;
1024         for (n = 0 ; n < facilities.source_ndigis ; n++)
1025                 make_rose->source_digis[n] = facilities.source_digis[n];
1026         make_rose->neighbour     = neigh;
1027         make_rose->device        = dev;
1028         make_rose->facilities    = facilities;
1029
1030         make_rose->neighbour->use++;
1031
1032         if (rose_sk(sk)->defer) {
1033                 make_rose->state = ROSE_STATE_5;
1034         } else {
1035                 rose_write_internal(make, ROSE_CALL_ACCEPTED);
1036                 make_rose->state = ROSE_STATE_3;
1037                 rose_start_idletimer(make);
1038         }
1039
1040         make_rose->condition = 0x00;
1041         make_rose->vs        = 0;
1042         make_rose->va        = 0;
1043         make_rose->vr        = 0;
1044         make_rose->vl        = 0;
1045         sk->sk_ack_backlog++;
1046
1047         rose_insert_socket(make);
1048
1049         skb_queue_head(&sk->sk_receive_queue, skb);
1050
1051         rose_start_heartbeat(make);
1052
1053         if (!sock_flag(sk, SOCK_DEAD))
1054                 sk->sk_data_ready(sk);
1055
1056         return 1;
1057 }
1058
1059 static int rose_sendmsg(struct socket *sock, struct msghdr *msg, size_t len)
1060 {
1061         struct sock *sk = sock->sk;
1062         struct rose_sock *rose = rose_sk(sk);
1063         DECLARE_SOCKADDR(struct sockaddr_rose *, usrose, msg->msg_name);
1064         int err;
1065         struct full_sockaddr_rose srose;
1066         struct sk_buff *skb;
1067         unsigned char *asmptr;
1068         int n, size, qbit = 0;
1069
1070         if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT))
1071                 return -EINVAL;
1072
1073         if (sock_flag(sk, SOCK_ZAPPED))
1074                 return -EADDRNOTAVAIL;
1075
1076         if (sk->sk_shutdown & SEND_SHUTDOWN) {
1077                 send_sig(SIGPIPE, current, 0);
1078                 return -EPIPE;
1079         }
1080
1081         if (rose->neighbour == NULL || rose->device == NULL)
1082                 return -ENETUNREACH;
1083
1084         if (usrose != NULL) {
1085                 if (msg->msg_namelen != sizeof(struct sockaddr_rose) && msg->msg_namelen != sizeof(struct full_sockaddr_rose))
1086                         return -EINVAL;
1087                 memset(&srose, 0, sizeof(struct full_sockaddr_rose));
1088                 memcpy(&srose, usrose, msg->msg_namelen);
1089                 if (rosecmp(&rose->dest_addr, &srose.srose_addr) != 0 ||
1090                     ax25cmp(&rose->dest_call, &srose.srose_call) != 0)
1091                         return -EISCONN;
1092                 if (srose.srose_ndigis != rose->dest_ndigis)
1093                         return -EISCONN;
1094                 if (srose.srose_ndigis == rose->dest_ndigis) {
1095                         for (n = 0 ; n < srose.srose_ndigis ; n++)
1096                                 if (ax25cmp(&rose->dest_digis[n],
1097                                             &srose.srose_digis[n]))
1098                                         return -EISCONN;
1099                 }
1100                 if (srose.srose_family != AF_ROSE)
1101                         return -EINVAL;
1102         } else {
1103                 if (sk->sk_state != TCP_ESTABLISHED)
1104                         return -ENOTCONN;
1105
1106                 srose.srose_family = AF_ROSE;
1107                 srose.srose_addr   = rose->dest_addr;
1108                 srose.srose_call   = rose->dest_call;
1109                 srose.srose_ndigis = rose->dest_ndigis;
1110                 for (n = 0 ; n < rose->dest_ndigis ; n++)
1111                         srose.srose_digis[n] = rose->dest_digis[n];
1112         }
1113
1114         /* Build a packet */
1115         /* Sanity check the packet size */
1116         if (len > 65535)
1117                 return -EMSGSIZE;
1118
1119         size = len + AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN;
1120
1121         if ((skb = sock_alloc_send_skb(sk, size, msg->msg_flags & MSG_DONTWAIT, &err)) == NULL)
1122                 return err;
1123
1124         skb_reserve(skb, AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN);
1125
1126         /*
1127          *      Put the data on the end
1128          */
1129
1130         skb_reset_transport_header(skb);
1131         skb_put(skb, len);
1132
1133         err = memcpy_from_msg(skb_transport_header(skb), msg, len);
1134         if (err) {
1135                 kfree_skb(skb);
1136                 return err;
1137         }
1138
1139         /*
1140          *      If the Q BIT Include socket option is in force, the first
1141          *      byte of the user data is the logical value of the Q Bit.
1142          */
1143         if (rose->qbitincl) {
1144                 qbit = skb->data[0];
1145                 skb_pull(skb, 1);
1146         }
1147
1148         /*
1149          *      Push down the ROSE header
1150          */
1151         asmptr = skb_push(skb, ROSE_MIN_LEN);
1152
1153         /* Build a ROSE Network header */
1154         asmptr[0] = ((rose->lci >> 8) & 0x0F) | ROSE_GFI;
1155         asmptr[1] = (rose->lci >> 0) & 0xFF;
1156         asmptr[2] = ROSE_DATA;
1157
1158         if (qbit)
1159                 asmptr[0] |= ROSE_Q_BIT;
1160
1161         if (sk->sk_state != TCP_ESTABLISHED) {
1162                 kfree_skb(skb);
1163                 return -ENOTCONN;
1164         }
1165
1166 #ifdef M_BIT
1167 #define ROSE_PACLEN (256-ROSE_MIN_LEN)
1168         if (skb->len - ROSE_MIN_LEN > ROSE_PACLEN) {
1169                 unsigned char header[ROSE_MIN_LEN];
1170                 struct sk_buff *skbn;
1171                 int frontlen;
1172                 int lg;
1173
1174                 /* Save a copy of the Header */
1175                 skb_copy_from_linear_data(skb, header, ROSE_MIN_LEN);
1176                 skb_pull(skb, ROSE_MIN_LEN);
1177
1178                 frontlen = skb_headroom(skb);
1179
1180                 while (skb->len > 0) {
1181                         if ((skbn = sock_alloc_send_skb(sk, frontlen + ROSE_PACLEN, 0, &err)) == NULL) {
1182                                 kfree_skb(skb);
1183                                 return err;
1184                         }
1185
1186                         skbn->sk   = sk;
1187                         skbn->free = 1;
1188                         skbn->arp  = 1;
1189
1190                         skb_reserve(skbn, frontlen);
1191
1192                         lg = (ROSE_PACLEN > skb->len) ? skb->len : ROSE_PACLEN;
1193
1194                         /* Copy the user data */
1195                         skb_copy_from_linear_data(skb, skb_put(skbn, lg), lg);
1196                         skb_pull(skb, lg);
1197
1198                         /* Duplicate the Header */
1199                         skb_push(skbn, ROSE_MIN_LEN);
1200                         skb_copy_to_linear_data(skbn, header, ROSE_MIN_LEN);
1201
1202                         if (skb->len > 0)
1203                                 skbn->data[2] |= M_BIT;
1204
1205                         skb_queue_tail(&sk->sk_write_queue, skbn); /* Throw it on the queue */
1206                 }
1207
1208                 skb->free = 1;
1209                 kfree_skb(skb);
1210         } else {
1211                 skb_queue_tail(&sk->sk_write_queue, skb);               /* Throw it on the queue */
1212         }
1213 #else
1214         skb_queue_tail(&sk->sk_write_queue, skb);       /* Shove it onto the queue */
1215 #endif
1216
1217         rose_kick(sk);
1218
1219         return len;
1220 }
1221
1222
1223 static int rose_recvmsg(struct socket *sock, struct msghdr *msg, size_t size,
1224                         int flags)
1225 {
1226         struct sock *sk = sock->sk;
1227         struct rose_sock *rose = rose_sk(sk);
1228         size_t copied;
1229         unsigned char *asmptr;
1230         struct sk_buff *skb;
1231         int n, er, qbit;
1232
1233         /*
1234          * This works for seqpacket too. The receiver has ordered the queue for
1235          * us! We do one quick check first though
1236          */
1237         if (sk->sk_state != TCP_ESTABLISHED)
1238                 return -ENOTCONN;
1239
1240         /* Now we can treat all alike */
1241         if ((skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, flags & MSG_DONTWAIT, &er)) == NULL)
1242                 return er;
1243
1244         qbit = (skb->data[0] & ROSE_Q_BIT) == ROSE_Q_BIT;
1245
1246         skb_pull(skb, ROSE_MIN_LEN);
1247
1248         if (rose->qbitincl) {
1249                 asmptr  = skb_push(skb, 1);
1250                 *asmptr = qbit;
1251         }
1252
1253         skb_reset_transport_header(skb);
1254         copied     = skb->len;
1255
1256         if (copied > size) {
1257                 copied = size;
1258                 msg->msg_flags |= MSG_TRUNC;
1259         }
1260
1261         skb_copy_datagram_msg(skb, 0, msg, copied);
1262
1263         if (msg->msg_name) {
1264                 struct sockaddr_rose *srose;
1265                 DECLARE_SOCKADDR(struct full_sockaddr_rose *, full_srose,
1266                                  msg->msg_name);
1267
1268                 memset(msg->msg_name, 0, sizeof(struct full_sockaddr_rose));
1269                 srose = msg->msg_name;
1270                 srose->srose_family = AF_ROSE;
1271                 srose->srose_addr   = rose->dest_addr;
1272                 srose->srose_call   = rose->dest_call;
1273                 srose->srose_ndigis = rose->dest_ndigis;
1274                 for (n = 0 ; n < rose->dest_ndigis ; n++)
1275                         full_srose->srose_digis[n] = rose->dest_digis[n];
1276                 msg->msg_namelen = sizeof(struct full_sockaddr_rose);
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, NET_NAME_UNKNOWN, 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_create("rose", S_IRUGO, init_net.proc_net, &rose_info_fops);
1580         proc_create("rose_neigh", S_IRUGO, init_net.proc_net,
1581                     &rose_neigh_fops);
1582         proc_create("rose_nodes", S_IRUGO, init_net.proc_net,
1583                     &rose_nodes_fops);
1584         proc_create("rose_routes", S_IRUGO, init_net.proc_net,
1585                     &rose_routes_fops);
1586 out:
1587         return rc;
1588 fail:
1589         while (--i >= 0) {
1590                 unregister_netdev(dev_rose[i]);
1591                 free_netdev(dev_rose[i]);
1592         }
1593         kfree(dev_rose);
1594 out_proto_unregister:
1595         proto_unregister(&rose_proto);
1596         goto out;
1597 }
1598 module_init(rose_proto_init);
1599
1600 module_param(rose_ndevs, int, 0);
1601 MODULE_PARM_DESC(rose_ndevs, "number of ROSE devices");
1602
1603 MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>");
1604 MODULE_DESCRIPTION("The amateur radio ROSE network layer protocol");
1605 MODULE_LICENSE("GPL");
1606 MODULE_ALIAS_NETPROTO(PF_ROSE);
1607
1608 static void __exit rose_exit(void)
1609 {
1610         int i;
1611
1612         remove_proc_entry("rose", init_net.proc_net);
1613         remove_proc_entry("rose_neigh", init_net.proc_net);
1614         remove_proc_entry("rose_nodes", init_net.proc_net);
1615         remove_proc_entry("rose_routes", init_net.proc_net);
1616         rose_loopback_clear();
1617
1618         rose_rt_free();
1619
1620         ax25_protocol_release(AX25_P_ROSE);
1621         ax25_linkfail_release(&rose_linkfail_notifier);
1622
1623         if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1624                 ax25_listen_release(&rose_callsign, NULL);
1625
1626 #ifdef CONFIG_SYSCTL
1627         rose_unregister_sysctl();
1628 #endif
1629         unregister_netdevice_notifier(&rose_dev_notifier);
1630
1631         sock_unregister(PF_ROSE);
1632
1633         for (i = 0; i < rose_ndevs; i++) {
1634                 struct net_device *dev = dev_rose[i];
1635
1636                 if (dev) {
1637                         unregister_netdev(dev);
1638                         free_netdev(dev);
1639                 }
1640         }
1641
1642         kfree(dev_rose);
1643         proto_unregister(&rose_proto);
1644 }
1645
1646 module_exit(rose_exit);